# 2012 United States House of Representatives elections in California

"none" is preferred when the title is already sufficiently detailed; see [[WP:SDNONE]]
Elections in California :
Federal governmentU.S. President
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2026 :
State governmentExecutive Governor
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Assembly
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Judiciary Court of appeals
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Elections by year
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2024 :
State propositions1910–1919
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1978
6
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13
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2010–2019
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2016
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1
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2024
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36
Full list :
Los Angeles CountyLos Angeles County Board of supervisors
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Ballot measures
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A
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U
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S
Elections
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Long Beach Mayor
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2022 :
Orange CountyOrange County Board of supervisors
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District attorney
2018
Anaheim Mayor
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Irvine Mayor
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Costa Mesa Municipal
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2024 :
SacramentoMayor
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2024 :
San Diego CountySan Diego County Board of supervisors
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San Diego Mayor
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San FranciscoMayor
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District attorney
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Board of education
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Ballot measures
2024
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Elections
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Mar
Nov
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2006
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Feb :
San JoseMayor
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Other localities
Bakersfield
Mayoral elections:
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2008
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Mayoral elections:
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Oakland
Mayoral elections:
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Mayoral elections:
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San Bernardino
Mayoral elections:
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Stockton
Mayoral elections:
2008
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2016
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2024 :
vte :
The 2012 United States House of Representatives elections in California were held on November 6, 2012, with a primary election on June 5, 2012. Voters elected the 53 U.S. representatives from the state, one from each of the state's 53 congressional districts. The elections coincided with the elections of other federal and state offices, including a quadrennial presidential election and a U.S. Senate election.
According to The Cook Political Report and Roll Call, the most competitive districts were the 7th, 10th, 26th, 36th, and 52nd; additionally, the 3rd, 9th, 24th, 41st, and 47th were rated as less than safe. Roll Call additionally listed the 21st district as competitive. Voters in 14 districts elected new representatives: the 1st, 2nd, 7th, 8th, 15th, 21st, 26th, 29th, 35th, 36th, 41st, 47th, 51st, and 52nd. Two districts, the 30th and the 44th, had two incumbents running against each other.
This was the first election using congressional districts drawn by the California Citizens Redistricting Commission. The districts, based on the 2010 United States census, were approved on August 15, 2011. It was also the first non-special election to use the nonpartisan blanket primary system established by Proposition 14. As a result, eight districts featured general elections with two candidates of the same party: the 15th, 30th, 35th, 40th, 43rd, and 44th with two Democrats; and the 8th and 31st with two Republicans.

## Overview
### Statewide

United States House of Representatives elections in California, 2012 Primary election — June 5, 2012 :
| Party | Party | Votes | Percentage | Candidates | Advancing to general | Seats contesting |
| | Democratic | 2,643,313 | 53.41% | 107 | 56 | 50 |
| | Republican | 2,072,433 | 41.87% | 98 | 46 | 44 |
| | No party preference | 189,783 | 3.83% | 25 | 4 | 4 |
| | Green | 26,674 | 0.54% | 6 | 0 | 0 |
| | Libertarian | 14,787 | 0.30% | 4 | 0 | 0 |
| | Peace and Freedom | 2,415 | 0.05% | 2 | 0 | 0 |
| Valid votes | Valid votes | 4,949,405 | 92.89% | — | — | — |
| Invalid votes | Invalid votes | 378,891 | 7.11% | — | — | — |
| Totals | Totals | 5,328,296 | 100.00% | 242 | 106 | — |
| Voter turnout | Voter turnout | 31.06% | 31.06% | | | |
United States House of Representatives elections in California, 2012 General election — November 6, 2012 :
| Party | Party | Votes | Percentage | Seats | +/– |
| | Democratic | 7,392,703 | 60.57% | 38 | 4 |
| | Republican | 4,530,012 | 37.12% | 15 | 4 |
| | No party preference | 281,642 | 2.31% | 0 | |
| Valid votes | Valid votes | 12,204,357 | 92.44% | — | — |
| Invalid or blank votes | Invalid or blank votes | 997,801 | 7.56% | — | — |
| Totals | Totals | 13,202,158 | 100.00% | 53 | — |
| Voter turnout | Voter turnout | 72.36% | 72.36% | | |
Popular vote
Democratic
53.41%
Republican
41.87%
No party preference
3.83%
Green
0.54%
Other
0.35% :
House seats
Democratic
71.70%
Republican
28.30% :

## Map key

This map displays the location of California's congressional districts during this election cycle, allowing the reader to cross-reference the location of each district.

## District 1

The 1st district is based in inland Northern California and includes Chico and Redding. Incumbent Republican Wally Herger, who represented the 2nd district from 1987 to 2013, retired. The district had a PVI of R+10.

### Primary election
#### Republican candidates
##### Advanced to general

* Doug LaMalfa, state senator

##### Eliminated in primary

* Sam Aanestad, former state senator
* Gregory Cheadle, real estate broker
* Michael Dacquisto, attorney
* Pete Stiglich, retired Air Force Colonel and candidate for this seat in 2010

##### Declined

* Wally Herger, incumbent U.S. Representative

#### Democratic candidates
##### Advanced to general

* Jim Reed, attorney and nominee for this seat in 2010

##### Eliminated in primary

* Nathan Arrowsmith

#### Campaign

Reed was endorsed by the California Democratic Party in February 2012. In March 2012, the California Republican Party declined to make an endorsement in the 1st district.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Doug LaMalfa | 66,527 | 37.9 |
| | Democratic | Jim Reed | 43,409 | 24.8 |
| | Republican | Sam Aanestad | 25,224 | 14.4 |
| | Republican | Michael Dacquisto | 10,530 | 6.0 |
| | Republican | Pete Stiglich | 10,258 | 5.8 |
| | Democratic | Nathan Arrowsmith | 8,598 | 4.9 |
| | No party preference | Gary Allen Oxley | 5,901 | 3.4 |
| | Republican | Gregory Cheadle | 4,939 | 2.8 |
| Total votes | Total votes | Total votes | 175,386 | 100.0 |

### General election
#### Endorsements

Organizations
* National Republican Congressional Committee "Vanguard" Program
* National Right to Life Committee
* NRA Political Victory Fund
* United States Chamber of Commerce
Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers

#### Results

California's 1st Congressional District, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Doug LaMalfa | 168,827 | 57.4 |
| | Democratic | Jim Reed | 125,386 | 42.6 |
| Majority | Majority | Majority | 43,441 | 14.8 |
| Total votes | Total votes | Total votes | 294,213 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 2

The 2nd district is based in California's North Coast and includes Marin County and Eureka. Democrat Lynn Woolsey, who represented the 6th district from 1993 to 2013, retired. The district had a PVI of D+19.

### Primary election
#### Democratic candidates
##### Advanced to general

* Jared Huffman, state assembly member

##### Eliminated in primary

* Susan Adams, nurse practitioner and Marin County Board of Supervisors member
* Andy Caffrey
* William Courtney, physician and researcher
* Larry Fritzlan, therapist
* Stacey Lawson, businesswoman and chemical engineer
* Tiffany Renée, former Petaluma City Council member
* Norman Solomon, journalist and activist

##### Declined

* Noreen Evans, state senator
* Gavin Newsom, incumbent Lieutenant Governor of California
* Pam Torliatt, Mayor of Petaluma
* Shirlee Zane, Sonoma County supervisor

#### Republican candidates
##### Advanced to general

* Daniel Roberts, Vietnam War veteran and investment company president

##### Eliminated in primary

* Mike Halliwell, college professor

##### Declined

* Jim Judd, manufacturing business owner and nominee for this seat in 2010

#### Independent candidates
##### Eliminated in primary

* Brooke Clarke, small business owner
* John Lewallen

#### Green Party candidates
##### Declined

* Marnie Glickman (Green), co-chair of the Marin County Green Party
* Nancy Mancias (Green), co-chair of the Marin County Green Party

#### Campaign

Regional delegates of the California Democratic Party met in January 2012 but did not endorse a nominee as no candidate received 50 per cent of the vote. Huffman received 48 per cent, Solomon 37 per cent, Adams 12 per cent and Lawson one percent. Meanwhile, Roberts received the endorsement of the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Susan Adams (D) | Andy Caffrey (D) | William Courtney (D) | Mike Halliwell (R) | Jared Huffman (D) | Stacey Lawson (D) | Tiffany Renée (D) | Daniel Roberts (R) | Norman Solomon (D) | Undecided |
| Lake Research Partners (D-Solomon) | April 17–19, 2012 | 500 (LV) | ± 4.4% | 8% | — | — | 3% | 18% | 5% | — | 3% | 10% | 47% |
| Fairbank, Maslin, Maullin, Metz & Associates (D-Huffman) | March 23–29, 2012 | 500 (LV) | ± 4.9% | 5% | — | — | 5% | 24% | 9% | — | 7% | 5% | 45% |
| Lake Research Partners (D-Solomon) | October 18–20, 2011 | 400 (LV) | ± 5.0% | 4% | 2% | 3% | — | 16% | 4% | 1% | 12% | 11% | 46% |
| Fairbank, Maslin, Maullin, Metz & Associates (D-Huffman) | October 5–9, 2011 | 400 (LV) | ± 5.0% | 5% | 4% | — | — | 20% | 5% | 3% | 18% | 7% | 37% |

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jared Huffman | 63,922 | 37.5 |
| | Republican | Daniel Roberts | 25,635 | 15.0 |
| | Democratic | Norman Solomon | 25,462 | 14.9 |
| | Democratic | Stacey Lawson | 16,946 | 9.9 |
| | Democratic | Susan Adams | 14,041 | 8.2 |
| | Republican | Mike Halliwell | 10,008 | 5.9 |
| | No party preference | Brooke Clarke | 3,715 | 2.2 |
| | Democratic | Tiffany Renée | 3,033 | 1.8 |
| | No party preference | John Lewallen | 2,488 | 1.5 |
| | Democratic | William L. Courtney | 2,385 | 1.4 |
| | Democratic | Andy Caffrey | 1,737 | 1.0 |
| | Democratic | Larry Fritzlan | 1,151 | 0.7 |
| Total votes | Total votes | Total votes | 170,523 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Democratic Congressional Campaign Committee "Majority Makers" Program
* Human Rights Campaign
* Sierra Club

#### Results

California's 2nd congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jared Huffman | 226,216 | 71.2 |
| | Republican | Daniel Roberts | 91,310 | 28.8 |
| Total votes | Total votes | Total votes | 317,526 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 3

The 3rd district is based in north central California and includes Davis, Fairfield, and Yuba City. Incumbent Democrat John Garamendi, who represented the 10th district from 2009 to 2013, ran for re-election. The district had a PVI of D+1.

### Primary election
#### Democratic candidates
##### Advanced to general

* John Garamendi, incumbent U.S. Representative

#### Republican candidates
##### Advanced to general

* Kim Vann, Colusa County Board of Supervisors member

##### Eliminated in primary

* Tony Carlos, Sutter County deputy district attorney
* Eugene Ray, realtor
* Rick Tubbs, pilot

##### Withdrawn

* Timothy Core, small business employee
* Charlie Schaupp, farmer

#### Campaign

Garamendi received the endorsement of the California Democratic Party in February 2012. In March 2012, the California Republican Party declined to make an endorsement in the 3rd district.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | John Garamendi (incumbent) | 59,546 | 51.5 |
| | Republican | Kim Vann | 30,254 | 26.2 |
| | Republican | Rick Tubbs | 17,902 | 15.5 |
| | Republican | Tony Carlos | 5,541 | 4.8 |
| | Republican | Eugene Ray | 2,438 | 2.1 |
| Total votes | Total votes | Total votes | 115,681 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Democratic Congressional Campaign Committee "Frontline" Program
* Human Rights Campaign
* National Organization for Women
* Sierra Club
Organizations
* Maggie's List
* National Republican Congressional Committee "Young Guns" Program
* NRA Political Victory Fund
* United States Chamber of Commerce

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | John Garamendi (D) | Kim Vann (R) | Undecided |
| GBA Strategies (D-House Majority PAC) | August 26–27, 2012 | 400 (LV) | ± 4.9% | 54% | 39% | 7% |
| DCCC (D) | July 25, 2012 | 303 (LV) | ± 5.6% | 52% | 37% | 11% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Likely D | November 5, 2012 |
| Rothenberg | Safe D | November 2, 2012 |
| Roll Call | Likely D | November 4, 2012 |
| Sabato's Crystal Ball | Safe D | November 5, 2012 |
| NY Times | Lean D | November 4, 2012 |
| RCP | Likely D | November 4, 2012 |
| The Hill | Lean D | November 4, 2012 |

#### Results

California's 3rd congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | John Garamendi (incumbent) | 126,882 | 54.2 |
| | Republican | Kim Vann | 107,086 | 45.8 |
| Majority | Majority | Majority | 19,796 | 8.4 |
| Total votes | Total votes | Total votes | 233,968 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 4

The 4th district is based in east central California and includes Lake Tahoe, Roseville, and Yosemite National Park. Incumbent Republican Tom McClintock, who had represented the 4th district since 2009, ran for re-election. The district had a PVI of R+10.

### Primary election
#### Republican candidates
##### Advanced to general

* Tom McClintock, incumbent U.S. Representative

##### Declined

* Dan Lungren, incumbent U.S. Representative for the 3rd district (running in the 7th)

#### Democratic candidates
##### Advanced to general

* Jack Uppal, retired semiconductor engineer

#### Campaign

Uppal was endorsed by the California Democratic Party in February 2012, with McClintock receiving the endorsement of the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

California's 4th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Tom McClintock (incumbent) | 114,311 | 64.8 |
| | Democratic | Jack Uppal | 62,130 | 35.2 |
| Total votes | Total votes | Total votes | 176,441 | 100.0 |

### General election
#### Endorsements

Organizations
* Campaign for Working Families
* National Right to Life Committee
* NRA Political Victory Fund
* Republican Liberty Caucus
* United States Chamber of Commerce
Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers

#### Results

California's 4th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Tom McClintock (incumbent) | 197,803 | 61.1 |
| | Democratic | Jack Uppal | 125,885 | 38.9 |
| Total votes | Total votes | Total votes | 323,688 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 5

The 5th district is based in the North Bay and includes Napa, Santa Rosa, and Vallejo. Incumbent Democrat Mike Thompson, who had represented the 1st district from 1999 to 2013, ran for re-election. The district had a PVI of D+18.

### Primary election
#### Democratic candidates
##### Advanced to general

* Mike Thompson, incumbent U.S. Representative

#### Republican candidates
##### Advanced to general

* Randy Loftin, tax and financial planning adviser

##### Eliminated in primary

* Stewart Cilley, accountant

#### Campaign

Thompson received the endorsement of the California Democratic Party in February 2012 while Loftin was endorsed by the California Republican Party in March.

#### Endorsements

Labor unions
* AFL-CIO
Organizations
* Blue Dog Coalition
Organizations
* Republican Liberty Caucus

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mike Thompson (incumbent) | 95,748 | 72.2 |
| | Republican | Randy Loftin | 22,137 | 16.7 |
| | Republican | Stewart Cilley | 14,734 | 11.1 |
| Total votes | Total votes | Total votes | 132,619 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Blue Dog Coalition
* Human Rights Campaign
* Sierra Club
Organizations
* Eagle Forum

#### Results

California's 5th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mike Thompson (incumbent) | 202,872 | 74.5 |
| | Republican | Randy Loftin | 69,545 | 25.5 |
| Total votes | Total votes | Total votes | 272,417 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 6

The 6th district is based in north central California and includes Sacramento. Incumbent Democrat Doris Matsui, who represented the 5th district from 2005 to 2013, ran for re-election here. The district had a PVI of D+13.

### Primary election
#### Democratic candidates
##### Advanced to general

* Doris Matsui, incumbent U.S. Representative

#### Republican candidates
##### Advanced to general

* Joseph McCray Sr., business owner

##### Eliminated in primary

* Erik Smitt

#### Campaign

Matsui was endorsed by the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Doris Matsui (incumbent) | 67,174 | 71.4 |
| | Republican | Joseph McCray, Sr. | 15,647 | 16.6 |
| | Republican | Erik Smitt | 11,254 | 12.0 |
| Total votes | Total votes | Total votes | 94,075 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Sierra Club

#### Results

California's 6th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Doris Matsui (incumbent) | 160,667 | 75.1 |
| | Republican | Joseph McCray, Sr. | 53,406 | 24.9 |
| Total votes | Total votes | Total votes | 214,073 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 7

The 7th district is based in north central California and includes eastern Sacramento County. Incumbent Republican Dan Lungren, who represented the 3rd district from 2005 to 2013 and previously served from 1979 until 1989, ran for re-election. The district had a PVI of R+3.

### Primary election
#### Republican candidates
##### Advanced to general

* Dan Lungren, incumbent U.S. Representative

##### Declined

* Darren Spellman, Calaveras County Board of Supervisors member

#### Democratic candidates
##### Advanced to general

* Ami Bera, physician and nominee for this seat in 2010

##### Declined

* Alyson Huber, state assembly member

#### Campaign

Bera received the endorsement of the California Democratic Party in February 2012. Lungren was endorsed by the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Dan Lungren (incumbent) | 63,586 | 52.7 |
| | Democratic | Ami Bera | 49,433 | 41.0 |
| | No party preference | Curt Taras | 3,854 | 3.2 |
| | Libertarian | Douglas Arthur Tuma | 3,707 | 3.1 |
| Total votes | Total votes | Total votes | 120,580 | 100.0 |

### General election
#### Endorsements

Organizations
* Campaign for Working Families
* National Republican Congressional Committee "Patriot" Program
* National Right to Life Committee
* United States Chamber of Commerce
Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Democratic Congressional Campaign Committee "Red to Blue" Program
* Human Rights Campaign
* National Organization for Women
* Sierra Club
* Veterans' Alliance for Security and Democracy

#### Debates

* Complete video of debate, September 25, 2012

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Dan Lungren (R) | Ami Bera (D) | Undecided |
| Public Policy Polling (D-CREDO) | October 25–26, 2012 | 792 (LV) | ± ?% | 46% | 46% | 8% |
| Garin-Hart-Yang (D-House Majority PAC)/SEIU) | August 21–23, 2012 | 401 (LV) | ± 5.0% | 47% | 47% | 6% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Tossup | November 5, 2012 |
| Rothenberg | Tilts D (flip) | November 2, 2012 |
| Roll Call | Tossup | November 4, 2012 |
| Sabato's Crystal Ball | Lean D (flip) | November 5, 2012 |
| NY Times | Lean D (flip) | November 4, 2012 |
| RCP | Tossup | November 4, 2012 |
| The Hill | Lean D (flip) | November 4, 2012 |

#### Results

California's 7th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Ami Bera | 141,241 | 51.7 |
| | Republican | Dan Lungren (incumbent) | 132,050 | 48.3 |
| Majority | Majority | Majority | 9,191 | 3.4 |
| Total votes | Total votes | Total votes | 273,291 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

#### Aftermath

In May 2016, Babulal Bera, Ami Bera's father, pleaded guilty to two felony counts of election fraud affecting the 2010 and 2012 elections, and was convicted of illegally funneling $250,000 to his son's campaigns between 2010 and 2012.

## District 8

The 8th district is based in the eastern High Desert and includes Victorville and Yucaipa. Incumbent Republican Jerry Lewis, who represented the 41st district from 2003 to 2013 and its predecessors since 1983, retired. The district had a PVI of R+12.

### Primary election
#### Republican candidates
##### Advanced to general

* Paul Cook, state assembly member
* Gregg Imus, co-founder of the Minuteman Civil Defense Corps of California

##### Eliminated in primary

* Dennis Albertsen, computer scientist
* George Craig
* Bill Jensen, former mayor of Hesperia
* Phillip Liberatore, accountant
* Ryan McEachron, Mayor of Victorville;
* Brad Mitzelfelt, San Bernardino County Supervisor
* Joseph Napolitano
* Angela Valles, member of the Victorville City Council

##### Declined

* Jerry Lewis, incumbent U.S. Representative

#### Democratic candidates
##### Eliminated in primary

* Jackie Conaway, law office manager and nominee for the 25th district in 2008 & 2010
* John Pinkerton, President of Victor Valley College Board of Trustees

#### Independent candidates
##### Eliminated in primary

* Anthony Adams, former Republican state assembly member

#### Campaign

Conaway was endorsed by the California Democratic Party in February 2012. In March 2012, the California Republican Party declined to endorse a candidate in the 8th district.

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Gregg Imus | 12,754 | 15.6 |
| | Republican | Paul Cook | 12,517 | 15.3 |
| | Republican | Phil Liberatore | 12,277 | 15.0 |
| | Democratic | Jackie Conaway | 11,674 | 14.3 |
| | Republican | Brad Mitzelfelt | 8,801 | 10.8 |
| | Democratic | John Pinkerton | 7,941 | 9.7 |
| | Republican | Angela Valles | 4,924 | 6.0 |
| | Republican | Ryan McEachron | 3,181 | 3.9 |
| | No party preference | Anthony Adams | 2,750 | 3.4 |
| | Republican | Bill Jensen | 1,850 | 2.3 |
| | Republican | George T. Craig | 1,376 | 1.7 |
| | Republican | Joseph D. Napolitano | 1,050 | 1.3 |
| | Republican | Dennis L. Albertsen | 761 | 0.9 |
| Total votes | Total votes | Total votes | 81,856 | 100.0 |

#### Endorsements

Labor unions
* AFL-CIO
* National Association of Letter Carriers
Organizations
* NRA Political Victory Fund
* United States Chamber of Commerce
Organizations
* Eagle Forum

#### Results

California's 8th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Paul Cook | 103,093 | 57.4 |
| | Republican | Gregg Imus | 76,551 | 42.6 |
| Total votes | Total votes | Total votes | 179,644 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 9

The 9th district is based in the Central Valley and includes the San Joaquin Delta and Stockton. Incumbent Democrat Jerry McNerney, who represented the 11th district from 2007 to 2013, ran for re-election here. The district had a PVI of D+2.

### Primary election
#### Democratic candidates
##### Advanced to general

* Jerry McNerney, incumbent U.S. Representative

#### Republican candidates
##### Advanced to general

* Ricky Gill, student at the UC Berkeley School of Law and former member of the California State Board of Education

##### Eliminated in primary

* John McDonald, technology executive,

##### Declined

* Tony Amador, retired US Marshal and candidate for this seat in 2010
* Brad Goehring, farmer and candidate for this seat in 2010
* David Harmer, businessman and nominee for this seat in 2010

#### Campaign

Gill was endorsed by the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jerry McNerney (incumbent) | 45,696 | 47.8 |
| | Republican | Ricky Gill | 38,488 | 40.2 |
| | Republican | John McDonald | 11,458 | 12.0 |
| Total votes | Total votes | Total votes | 95,642 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Democratic Congressional Campaign Committee "Frontline" Program
* Human Rights Campaign
* National Organization for Women
* Sierra Club
Organizations
* National Republican Congressional Committee "Young Guns" Program
* National Right to Life Committee
* NRA Political Victory Fund
* United States Chamber of Commerce

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Jerry McNerney (D) | Ricky Gill (R) | Undecided |
| Global Strategy Group (D-DCCC) | October 8–10, 2012 | 400 (LV) | ± 4.9% | 47% | 38% | 15% |
| Tarrance (R-Gill) | September 30–October 2, 2012 | 409 (LV) | ± 4.9% | 45% | 46% | 9% |
| Tarrance (R-Gill) | July 24–26, 2012 | 402 (LV) | ± 5.7% | 47% | 45% | 9% |
| Lake Research Partners (D-McNerney) | July 8–11, 2012 | 504 (LV) | ± 4.6% | 49% | 33% | 18% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Tossup | November 5, 2012 |
| Rothenberg | Tilts D | November 2, 2012 |
| Roll Call | Tossup | November 4, 2012 |
| Sabato's Crystal Ball | Lean D | November 5, 2012 |
| NY Times | Lean D | November 4, 2012 |
| RCP | Tossup | November 4, 2012 |
| The Hill | Lean D | November 4, 2012 |

#### Results

California's 9th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jerry McNerney (incumbent) | 118,373 | 55.6 |
| | Republican | Ricky Gill | 94,704 | 44.4 |
| Majority | Majority | Majority | 23,669 | 11.2 |
| Total votes | Total votes | Total votes | 213,077 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 10

The 10th district is based in the Central Valley and includes Modesto and Tracy. Incumbent Democrat Dennis Cardoza, who represented the 18th district from 2003 to 2013, retired. Incumbent Republican Jeff Denham, who represented the 19th district from 2011 to 2013, ran for re-election here. The district had a PVI of R+5.

### Primary election
#### Republican candidates
##### Advanced to general

* Jeff Denham, incumbent U.S. Representative for the 19th district

#### Democratic candidates
##### Advanced to general

* José Hernández, former NASA astronaut

##### Eliminated in primary

* Mike Barkley, lawyer and certified public accountant;

##### Declined

* Dennis Cardoza, incumbent U.S. Representative for the 18th district

#### Independent candidates
##### Eliminated in primary

* Chad Condit, son of former U.S. Representative Gary Condit
* Troy McComack, small business owner

#### Campaign

Hernandez was endorsed by the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Jeff Denham (incumbent) | 45,779 | 49.2 |
| | Democratic | José Hernández | 26,072 | 28.0 |
| | No party preference | Chad M. Condit | 13,983 | 15.0 |
| | Democratic | Michael J. "Mike" Barkley | 5,028 | 5.4 |
| | No party preference | Troy Wayne McComack | 2,114 | 2.3 |
| Total votes | Total votes | Total votes | 92,976 | 100.0 |

### General election
#### Endorsements

Organizations
* Campaign for Working Families
* National Republican Congressional Committee "Patriot" Program
* National Right to Life Committee
* NRA Political Victory Fund
* United States Chamber of Commerce
Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Democracy for America
* Democratic Congressional Campaign Committee "Red to Blue" Program
* Human Rights Campaign
* Sierra Club

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Jeff Denham (R) | José Hernández (D) | Undecided |
| Momentum Analysis (D-Hernandez) | September 29– October 1, 2012 | 500 (LV) | ± 4.5% | 45% | 43% | 12% |
| DCCC (D) | September 10, 2012 | 382 (LV) | ± 5.0% | 44% | 46% | 11% |
| Public Policy Polling (D-Democracy for America) | August 7–9, 2012 | 751 (LV) | ± ?% | 48% | 41% | 12% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Tossup | November 5, 2012 |
| Rothenberg | Tilts R | November 2, 2012 |
| Roll Call | Tossup | November 4, 2012 |
| Sabato's Crystal Ball | Lean R | November 5, 2012 |
| NY Times | Lean R | November 4, 2012 |
| RCP | Tossup | November 4, 2012 |
| The Hill | Tossup | November 4, 2012 |

#### Results

California's 10th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Jeff Denham (incumbent) | 110,265 | 52.7 |
| | Democratic | José Hernández | 98,934 | 47.3 |
| Majority | Majority | Majority | 11,331 | 5.4 |
| Total votes | Total votes | Total votes | 209,199 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 11

The 11th district is based in the East Bay and includes Concord and Richmond. Incumbent Democrat George Miller, who represented the 7th district from 1975 to 2013, ran for re-election here. The district had a PVI of D+17.

### Primary election
#### Democratic candidates
##### Advanced to general

* George Miller, incumbent U.S. Representative

##### Eliminated in primary

* John Fitzgerald, small business owner
* Cheryl Sudduth, public policy advocate

#### Republican candidates
##### Advanced to general

* Virginia Fuller, nurse

#### Campaign

Miller received the endorsement of the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | George Miller (incumbent) | 76,163 | 58.5 |
| | Republican | Virginia Fuller | 40,333 | 31.0 |
| | Democratic | John Fitzgerald | 9,092 | 7.0 |
| | Democratic | Cheryl Sudduth | 4,635 | 3.6 |
| Total votes | Total votes | Total votes | 130,223 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Sierra Club

#### Results

California's 11th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | George Miller (incumbent) | 200,743 | 69.7 |
| | Republican | Virginia Fuller | 87,136 | 30.3 |
| Total votes | Total votes | Total votes | 287,879 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 12

The 12th district is based in the Bay Area and includes most of San Francisco. House Democratic Leader and former Speaker Nancy Pelosi, who represented the 8th district from 1993 to 2013 and previously represented the 5th district from 1987 until 1993, ran for re-election here. The district had a PVI of D+35.

### Primary election
#### Democratic candidates
##### Advanced to general

* Nancy Pelosi, incumbent U.S. Representative and House Minority Leader

##### Eliminated in primary

* Americo Artura Diaz, self-employed designer
* David Peterson, businessman
* Summer Justice Shields

#### Republican candidates
##### Advanced to general

* John Dennis, real estate developer

#### Green candidates
##### Eliminated in primary

* Barry Hermanson

#### Campaign

Pelosi was endorsed by the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Nancy Pelosi (incumbent) | 89,446 | 74.9 |
| | Republican | John Dennis | 16,206 | 13.6 |
| | Green | Barry Hermanson | 6,398 | 5.4 |
| | Democratic | David Peterson | 3,756 | 3.1 |
| | Democratic | Summer Justice Shields | 2,146 | 1.9 |
| | Democratic | Américo Arturo Díaz | 1,499 | 1.3 |
| Total votes | Total votes | Total votes | 119,451 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Sierra Club
Organizations
* GOProud
* Republican Liberty Caucus

#### Results

California's 12th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Nancy Pelosi (incumbent) | 253,709 | 85.1 |
| | Republican | John Dennis | 44,478 | 14.9 |
| Total votes | Total votes | Total votes | 298,187 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 13

The 13th district is based in the East Bay and includes Berkeley and Oakland. Democrat Barbara Lee, who represented the 9th district from 1998 to 2013, ran for re-election here. The district had a PVI of D+37.

### Primary election
#### Democratic candidates
##### Advanced to general

* Barbara Lee, incumbent U.S. Representative

##### Eliminated in primary

* Justin Jelincic

#### Independent candidates
##### Advanced to general

* Marilyn Singleton, physician

#### Campaign

Lee received the endorsement of the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Barbara Lee (incumbent) | 94,709 | 83.1 |
| | No party preference | Marilyn M. Singleton | 13,502 | 11.8 |
| | Democratic | Justin Jelincic | 5,741 | 5.0 |
| Total votes | Total votes | Total votes | 113,952 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Progressive Democrats of America
* Sierra Club

#### Results

California's 13th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Barbara Lee (incumbent) | 250,436 | 86.8 |
| | No party preference | Marilyn M. Singleton | 38,146 | 13.2 |
| Total votes | Total votes | Total votes | 288,582 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 14

The 14th district is based in the Bay Area and includes most of San Mateo County. Incumbent Democrat Jackie Speier, who represented the 12th district from 2008 to 2013, ran for re-election here. The district had a PVI of D+23.

### Primary election
#### Democratic candidates
##### Advanced to general

* Jackie Speier, incumbent U.S. Representative

##### Eliminated in primary

* Mike Maloney, perennial candidate

#### Republican candidates
##### Advanced to general

* Deborah Bacigalupi, businesswoman

#### Campaign

Speier was endorsed by the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jackie Speier (incumbent) | 80,850 | 74.3 |
| | Republican | Deborah Bacigalupi | 23,299 | 21.4 |
| | Democratic | Michael J. Moloney | 4,607 | 4.2 |
| Total votes | Total votes | Total votes | 108,756 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Sierra Club
Organizations
* Eagle Forum

#### Results

California's 14th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jackie Speier (incumbent) | 203,828 | 78.9 |
| | Republican | Deborah Bacigalupi | 54,455 | 21.1 |
| Total votes | Total votes | Total votes | 258,283 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 15

The 15th district is based in the East Bay and includes Hayward and Livermore. Incumbent Democrat Pete Stark, who represented the 13th district from 1993 to 2013 and its predecessors since 1973, ran for re-election here. The district had a PVI of D+15.

### Primary election
#### Democratic candidates
##### Advanced to general

* Pete Stark, incumbent U.S. Representative
* Eric Swalwell, Alameda County deputy district attorney and member of the Dublin city council

#### Independent candidates
##### Eliminated in primary

* Christopher Pareja, businessman

#### Campaign

Stark received the endorsement of the California Democratic Party in February 2012. Swalwell won the Tri Valley Democratic Club's Straw Poll on February 20.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pete Stark (incumbent) | 39,943 | 42.1 |
| | Democratic | Eric Swalwell | 34,347 | 36.0 |
| | No party preference | Christopher "Chris" J. Pareja | 20,618 | 21.7 |
| Total votes | Total votes | Total votes | 94,908 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* Sierra Club

#### Results

California's 15th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Eric Swalwell | 120,388 | 52.1 |
| | Democratic | Pete Stark (incumbent) | 110,646 | 47.9 |
| Majority | Majority | Majority | 9,742 | 4.2 |
| Total votes | Total votes | Total votes | 231,034 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 16

The 16th district is based in the Central Valley and includes Fresno and Merced. Incumbent Democrat Jim Costa, who represented the 20th district from 2005 to 2013, ran for re-election here. The district had a PVI of D+2.

### Primary election
#### Democratic candidates
##### Advanced to general

* Jim Costa, incumbent U.S. Representative

##### Eliminated in primary

* Loraine Goodwin, physician and member of the California Democratic State Central Committee

##### Declined

* Dennis Cardoza, incumbent U.S. Representative for the 18th district

#### Republican candidates
##### Advanced to general

* Brian Whelan, farmer and attorney

##### Eliminated in primary

* Mark Garcia, small business owner
* Johnny Tacherra, farmer

##### Declined

* Jeff Denham, incumbent U.S. Representative for the 19th district
* Case Lawrence, entrepreneur
* Clint Olivier, member of the Fresno City Council
* Jim Patterson, former mayor of Fresno
* Mark Pazin, Merced County Sheriff
* Andy Vidak, farmer and nominee for this seat in 2010

#### Endorsements

Labor unions
* AFL-CIO
Organizations
* Blue Dog Coalition

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jim Costa (incumbent) | 25,355 | 42.7 |
| | Republican | Brian Daniel Whelan | 15,053 | 25.3 |
| | Republican | Johnny M. Tacherra | 6,776 | 11.4 |
| | Republican | Mark Garcia | 6,529 | 11.0 |
| | Democratic | Loraine Goodwin | 5,703 | 9.6 |
| Total votes | Total votes | Total votes | 59,416 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Blue Dog Coalition
* United States Chamber of Commerce
Organizations
* National Republican Congressional Committee "Contender" Program
* National Right to Life Committee

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Safe D | November 5, 2012 |
| Rothenberg | Safe D | November 2, 2012 |
| Roll Call | Safe D | November 4, 2012 |
| Sabato's Crystal Ball | Safe D | November 5, 2012 |
| NY Times | Lean D | November 4, 2012 |
| RCP | Safe D | November 4, 2012 |
| The Hill | Likely D | November 4, 2012 |

#### Results

California's 16th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jim Costa (incumbent) | 84,649 | 57.4 |
| | Republican | Brian Daniel Whelan | 62,801 | 42.6 |
| Majority | Majority | Majority | 21,848 | 14.8 |
| Total votes | Total votes | Total votes | 147,450 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 17

The 17th district is based in the Bay Area and includes Sunnyvale, Cupertino, Santa Clara, Fremont, and Milpitas. Democrat Mike Honda, who represented the 15th district from 2001 to 2013, ran for re-election here.
Charles Richardson ran as a Libertarian Party candidate.

### Primary election
#### Democratic candidates
##### Advanced to general

* Mike Honda, incumbent U.S. Representative

#### Republican candidates
##### Advanced to general

* Evelyn Li, cardiologist and founder of patient advocate organization

#### Campaign

Honda received the endorsement of the California Democratic Party in February 2012. Li was endorsed by the California Republican Party in March 2012.

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mike Honda (incumbent) | 60,252 | 66.7 |
| | Republican | Evelyn Li | 24,916 | 27.6 |
| | No party preference | Charles Richardson | 5,163 | 5.7 |
| Total votes | Total votes | Total votes | 90,331 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Sierra Club

#### Results

California's 17th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mike Honda (incumbent) | 159,392 | 73.5 |
| | Republican | Evelyn Li | 57,336 | 26.5 |
| Total votes | Total votes | Total votes | 216,728 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 18

The 18th district is based in the Bay Area and includes Palo Alto, Redwood City, and Saratoga. Democrat Anna Eshoo, who represented the 14th district from 1993 to 2013, ran for re-election.

### Primary election
#### Democratic candidates
##### Advanced to general

* Anna Eshoo, incumbent U.S. Representative

##### Eliminated in primary

* William Parks

#### Republican candidates
##### Advanced to general

* Dave Chapman, nominee for this seat in 2010

#### Green candidates
##### Eliminated in primary

* Carol Brouillet, part of the Occupy movement

#### Campaign

Eshoo was endorsed by the California Democratic Party in February 2012. Chapman received the endorsement of the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Anna Eshoo (incumbent) | 86,851 | 61.5 |
| | Republican | Dave Chapman | 42,174 | 29.8 |
| | Democratic | William Parks | 6,504 | 4.6 |
| | Green | Carol Brouillet | 5,777 | 4.1 |
| Total votes | Total votes | Total votes | 141,306 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Sierra Club

#### Results

California's 18th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Anna Eshoo (incumbent) | 212,831 | 70.5 |
| | Republican | Dave Chapman | 89,103 | 29.5 |
| Total votes | Total votes | Total votes | 301,934 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 19

The 19th district is based in the South Bay and includes most of San Jose. Democrat Zoe Lofgren, who represented the 16th district from 1995 to 2013, ran for re-election here.

### Primary election
#### Democratic candidates
##### Advanced to general

* Zoe Lofgren, incumbent U.S. Representative

#### Republican candidates
##### Advanced to general

* Robert Murray

##### Eliminated in primary

* Phat Nguyen

#### Campaign

Lofgren received the endorsement of the California Democratic Party in February 2012. Murray was endorsed by the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Zoe Lofgren (incumbent) | 60,726 | 65.2 |
| | Republican | Robert Murray | 21,421 | 23.0 |
| | Republican | Phat Nguyen | 7,192 | 7.7 |
| | No party preference | Jay Cabrera | 3,829 | 4.1 |
| Total votes | Total votes | Total votes | 93,168 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Sierra Club

#### Results

California's 19th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Zoe Lofgren (incumbent) | 162,300 | 73.2 |
| | Republican | Robert Murray | 59,313 | 26.8 |
| Total votes | Total votes | Total votes | 221,613 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 20

The 20th district is based in the Central Coast and includes Monterey and Santa Cruz. Democrat Sam Farr, who represented the 17th district from 1993 to 2013, ran for re-election here.

### Primary election
#### Democratic candidates
##### Advanced to general

* Sam Farr, incumbent U.S. Representative

##### Eliminated in primary

* Art Dunn, Vice President of Ansavoice Communications

#### Republican candidates
##### Advanced to general

* Jeff Taylor, farmer

##### Eliminated in primary

* Mike LeBarre

#### Campaign

Farr was endorsed by the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Sam Farr (incumbent) | 68,895 | 64.4 |
| | Republican | Jeff Taylor | 23,905 | 22.3 |
| | Republican | Mike LeBarre | 5,487 | 5.1 |
| | Democratic | Art Dunn | 4,095 | 3.8 |
| | Green | Eric Petersen | 2,211 | 2.1 |
| | No party preference | Robert Paul Kabat | 1,733 | 1.6 |
| | No party preference | Dan Caudle | 703 | 0.7 |
| Total votes | Total votes | Total votes | 107,029 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Sierra Club

#### Results

California's 20th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Sam Farr (incumbent) | 172,996 | 74.1 |
| | Republican | Jeff Taylor | 60,566 | 25.9 |
| Total votes | Total votes | Total votes | 233,562 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 21

The 21st district is based in the Central Valley and includes Hanford and parts of Bakersfield. This new district had no incumbent.

### Primary election
#### Republican candidates
##### Advanced to general

* David Valadao, state assembly member

##### Declined

* Andy Vidak, farmer and nominee for the 20th district in 2010

#### Democratic candidates
##### Advanced to general

* John Hernandez, chief executive officer of the Central California Hispanic Chamber of Commerce

##### Eliminated in primary

* Blong Xiong, Fresno City Council member

##### Declined

* Cruz Bustamante, former Lieutenant Governor and nominee for governor in 2003
* Dennis Cardoza, incumbent U.S. Representative for the 18th district
* Jim Costa, incumbent U.S. Representative for the 20th district
* Michael Rubio, state senator

#### Campaign

Valadao was endorsed by the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | David Valadao | 27,251 | 57.0 |
| | Democratic | John Hernandez | 10,575 | 22.1 |
| | Democratic | Blong Xiong | 9,990 | 20.9 |
| Total votes | Total votes | Total votes | 47,816 | 100.0 |

### General election
#### Endorsements

Organizations
* National Republican Congressional Committee "Young Guns" Program
* National Right to Life Committee
* NRA Political Victory Fund
* United States Chamber of Commerce
Labor unions
* AFL-CIO
* National Association of Letter Carriers

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | David Valadao (R) | John Hernandez (D) | Undecided |
| Fairbank, Maslin, Maullin, Metz & Associates (D-Hernandez) | October 13–16, 2012 | 509 (LV) | ± 4.4% | 41% | 37% | 22% |
| Moore (R-Valadao) | October 8–9, 2012 | 400 (LV) | ± 5.0% | 53% | 33% | 14% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Likely R | November 5, 2012 |
| Rothenberg | Safe R | November 2, 2012 |
| Roll Call | Safe R | November 4, 2012 |
| Sabato's Crystal Ball | Likely R | November 5, 2012 |
| NY Times | Lean R | November 4, 2012 |
| RCP | Likely R | November 4, 2012 |
| The Hill | Lean R | November 4, 2012 |

#### Results

California's 21st congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | David Valadao | 67,164 | 57.8 |
| | Democratic | John Hernandez | 49,119 | 42.2 |
| Majority | Majority | Majority | 18,045 | 15.6 |
| Total votes | Total votes | Total votes | 116,283 | 100.0 |
| | Republican win (new seat) | Republican win (new seat) | Republican win (new seat) | Republican win (new seat) |

## District 22

The 22nd district is based in the Central Valley and includes Clovis, Tulare, and Visalia. Republican Devin Nunes, who represented the 21st district from 2003 to 2013, ran for re-election here.

### Primary election
#### Republican candidates
##### Advanced to general

* Devin Nunes, incumbent U.S. Representative

#### Democratic candidates
##### Advanced to general

* Otto Lee, lawyer and former member of the Sunnyvale City Council

#### Campaign

Nunes received the endorsement of the California Democratic Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Devin Nunes (incumbent) | 67,386 | 70.6 |
| | Democratic | Otto Lee | 28,091 | 29.4 |
| Total votes | Total votes | Total votes | 95,477 | 100.0 |

### General election
#### Endorsements

Organizations
* Campaign for Working Families
* National Right to Life Committee
* NRA Political Victory Fund
* United States Chamber of Commerce
Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers

#### Results

California's 22nd congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Devin Nunes (incumbent) | 132,386 | 61.9 |
| | Democratic | Otto Lee | 81,555 | 38.1 |
| Total votes | Total votes | Total votes | 213,941 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 23

The 23rd district is based in the southern Central Valley and includes parts of Bakersfield. House Majority Whip and Republican Kevin McCarthy, who represented the 22nd district from 2007 to 2013, ran for re-election here.

### Primary election
#### Republican candidates
##### Advanced to general

* Kevin McCarthy, incumbent U.S. Representative

#### Democratic candidates

No Democrats filed.

#### Independent candidates
##### Advanced to general

* Terry Phillips, former news reporter for Valley Public Radio, CBS, and NBC/Mutual

#### Campaign

McCarthy was endorsed by the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Kevin McCarthy (incumbent) | 71,109 | 72.2 |
| | No party preference | Terry Phillips | 17,018 | 17.3 |
| | Republican | Eric Parker | 10,414 | 10.6 |
| Total votes | Total votes | Total votes | 98,541 | 100.0 |

### General election
#### Endorsements

Organizations
* Campaign for Working Families
* National Right to Life Committee
* NRA Political Victory Fund
* United States Chamber of Commerce
Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers

#### Results

California's 23rd congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Kevin McCarthy (incumbent) | 158,161 | 73.2 |
| | No party preference | Terry Phillips | 57,842 | 26.8 |
| Total votes | Total votes | Total votes | 216,003 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 24

The 24th district is based in the Central Coast and includes San Luis Obispo and Santa Barbara. Democrat Lois Capps, who represented California's 23rd congressional district from 2003 to 2013 and the 22nd district from 1998 to 2003, ran for re-election here.

### Primary election
#### Democratic candidates
##### Advanced to general

* Lois Capps, incumbent U.S. Representative

#### Republican candidates
##### Advanced to general

* Abel Maldonado, former Lieutenant Governor

##### Eliminated in primary

* Christopher Mitchum, former actor and businessman

##### Withdrawn

* Tom Watson

#### Campaign

Capps received the endorsement of the California Democratic Party in February 2012. In March 2012, the California Republican Party declined to endorse any candidate, while the Santa Barbara County party endorsed Mitchum.

#### Endorsements

Labor unions
* AFL-CIO
Organizations
* Sierra Club

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Lois Capps (incumbent) | 72,356 | 46.4 |
| | Republican | Abel Maldonado | 46,295 | 29.7 |
| | Republican | Christopher Mitchum | 33,604 | 21.5 |
| | No party preference | Matt Boutté | 3,832 | 2.5 |
| Total votes | Total votes | Total votes | 156,087 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Democratic Congressional Campaign Committee "Frontline" Program
* EMILY's List
* Human Rights Campaign
* National Organization for Women
* Sierra Club
Organizations
* National Republican Congressional Committee "Young Guns" Program
* United States Chamber of Commerce

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Lois Capps (D) | Abel Maldonado (R) | Undecided |
| Public Opinion Strategies (R-Maldonado) | October 1–3, 2012 | 400 (LV) | ± 4.9% | 44% | 45% | 11% |
| DCCC (D) | July 23, 2012 | 379 (LV) | ± 5.0% | 51% | 40% | 9% |
| Public Opinion Strategies (R-Maldonado) | June 26–28, 2012 | 300 (LV) | ± 5.7% | 48% | 46% | 6% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Lean D | November 5, 2012 |
| Rothenberg | Tilts D | November 2, 2012 |
| Roll Call | Tossup | November 4, 2012 |
| Sabato's Crystal Ball | Lean D | November 5, 2012 |
| NY Times | Lean D | November 4, 2012 |
| RCP | Tossup | November 4, 2012 |
| The Hill | Tossup | November 4, 2012 |

#### Results

California's 24th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Lois Capps (incumbent) | 156,749 | 55.1 |
| | Republican | Abel Maldonado | 127,746 | 44.9 |
| Majority | Majority | Majority | 29,003 | 10.2 |
| Total votes | Total votes | Total votes | 284,495 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 25

The 25th district is based in northern Los Angeles County and includes Palmdale and Santa Clarita. Republican Howard McKeon, who had represented the 25th district since 1993, ran for re-election.

### Primary election
#### Republican candidates
##### Advanced to general

* Howard McKeon, incumbent U.S. Representative

##### Eliminated in primary

* Dante Acosta, financial advisor
* Cathie Wright, daughter of former state senator Catherine Wright

##### Declined

* Elton Gallegly, incumbent U.S. Representative for the 24th district

#### Democratic candidates
##### Advanced to general

* Lee Rogers, podiatrist

#### Withdrawn

* Laura Molina, artist.

#### Campaign

Rogers was endorsed by the California Democratic Party in February 2012. McKeon received the endorsement of the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Howard McKeon (incumbent) | 39,997 | 50.5 |
| | Democratic | Lee Rogers | 23,542 | 29.7 |
| | Republican | Dante Acosta | 10,387 | 13.1 |
| | Republican | Cathie Wright | 5,215 | 6.6 |
| Total votes | Total votes | Total votes | 79,141 | 100.0 |

### General election
#### Endorsements

Organizations
* National Right to Life Committee
* NRA Political Victory Fund
* United States Chamber of Commerce
Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
Organizations
* Sierra Club

#### Results

California's 25th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Howard McKeon (incumbent) | 129,593 | 54.8 |
| | Democratic | Lee Rogers | 106,982 | 45.2 |
| Majority | Majority | Majority | 22,611 | 9.6 |
| Total votes | Total votes | Total votes | 236,575 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 26

The 26th district is based in the southern Central Coast and includes Oxnard and Thousand Oaks. Republican Elton Gallegly, who represented the 24th district from 2003 to 2013 and its predecessors since 1987, retired.

### Primary election
#### Republican candidates
##### Advanced to general

* Tony Strickland, state senator

##### Declined

* Glen Becerra, member of the Simi Valley City Council
* David Dreier, incumbent U.S. Representative for the 26th district
* Elton Gallegly, incumbent U.S. Representative for the 24th district
* Keith Millhouse, member of the Moorpark City Council
* Greg Totten, Ventura County District Attorney

#### Democratic candidates
##### Advanced to general

* Julia Brownley, state assembly member

##### Eliminated in primary

* Albert Maxwell Goldberg, real estate agent and broker
* Jess Herrera, commissioner of the Oxnard Harbor District
* David Cruz Thayne, businessman and former professional tennis player

##### Withdrawn

* Steve Bennett, member of the Ventura County Board of Supervisors
* David Pollock, member of the Moorpark City Council
* Esequiel Ruelas, retired longshoreman; ended his campaign and endorsed Brownley

##### Declined

* Richard Francis, former mayor of Ventura
* Fran Pavley, state senator
* Mary Anne Rooney, commissioner of the Oxnard Harbor District
* Brad Sherman, incumbent U.S. Representative for the 27th district

#### Independent candidates
##### Eliminated in primary

* Linda Parks, member of the Ventura County Board of Supervisors (and previously a registered Republican)

##### Withdrawn

* Akiva Werbalowsky, permaculture designer

#### Campaign

At the California Democratic Party convention, held in February 2012, delegates voted to make no endorsement. In March 2012, Strickland was endorsed by the California Republican Party.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Tony Strickland | 49,043 | 44.1 |
| | Democratic | Julia Brownley | 29,892 | 26.9 |
| | No party preference | Linda Parks | 20,301 | 18.3 |
| | Democratic | Jess Herrera | 7,244 | 6.5 |
| | Democratic | David Cruz Thayne | 2,809 | 2.5 |
| | Democratic | Alex Maxwell Goldberg | 1,880 | 1.7 |
| Total votes | Total votes | Total votes | 111,169 | 100.0 |

### General election
#### Endorsements

Organizations
* American Conservative Union
* National Republican Congressional Committee "Young Guns" Program
* National Right to Life Committee
* NRA Political Victory Fund
* United States Chamber of Commerce
Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Democratic Congressional Campaign Committee "Red to Blue" Program
* EMILY's List
* Human Rights Campaign
* National Organization for Women
* Sierra Club

#### Debate

2012 California's 26th congressional district debate :
| No. | Date | Host | Moderator | Link | Republican | Democratic |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | | |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Tony Strickland | Julia Brownley |
| 1 | Oct. 2, 2012 | California Lutheran University Ventura County Star | Henry Dubroff Timm Herdt | | P | P |

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Tony Strickland (R) | Julia Brownley (D) | Undecided |
| Tulchin Research (D-Brownley) | July 15–19, 2012 | 700 (LV) | ± 3.7% | 44% | 48% | 8% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Tossup | November 5, 2012 |
| Rothenberg | Tossup | November 2, 2012 |
| Roll Call | Tossup | November 4, 2012 |
| Sabato's Crystal Ball | Lean D (flip) | November 5, 2012 |
| NY Times | Lean D (flip) | November 4, 2012 |
| RCP | Tossup | November 4, 2012 |
| The Hill | Tossup | November 4, 2012 |

#### Results

California's 26th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Julia Brownley | 139,072 | 52.7 |
| | Republican | Tony Strickland | 124,863 | 47.3 |
| Majority | Majority | Majority | 14,209 | 5.4 |
| Total votes | Total votes | Total votes | 263,935 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## District 27

The 27th district is based in the San Gabriel Foothills and includes Alhambra and Pasadena. Democrat Judy Chu, who represented the 32nd district from 2009 to 2013, ran for re-election here.

### Primary election
#### Democratic candidates
##### Advanced to general

* Judy Chu, incumbent U.S. Representative

#### Republican candidates
##### Advanced to general

* Jack Orswell, small business owner

##### Eliminated in primary

* Bob Duran, tax attorney and businessman

#### Campaign

Chu received the endorsement of the California Democratic Party in February 2012. Orswell received the endorsement of the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Judy Chu (incumbent) | 50,203 | 57.8 |
| | Republican | Jack Orswell | 20,868 | 24.0 |
| | Republican | Bob Duran | 15,819 | 18.2 |
| Total votes | Total votes | Total votes | 86,890 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Sierra Club

#### Results

California's 27th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Judy Chu (incumbent) | 154,191 | 64.0 |
| | Republican | Jack Orswell | 86,817 | 36.0 |
| Total votes | Total votes | Total votes | 241,008 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 28

The 28th district is based in the northern Los Angeles suburbs and includes Burbank and Glendale as well as parts of central Los Angeles. Democrat Adam Schiff, who represented the 29th district from 2003 to 2013 and the 27th district from 2001 to 2003, ran for re-election here.

### Primary election
#### Democratic candidates
##### Advanced to general

* Adam Schiff, incumbent U.S. Representative

##### Eliminated in primary

* Sal Genovese, community services administrator
* Jonathan Ryan Kalbfeld, entrepreneur and software engineer
* Massie Munroe, civil engineer

#### Republican candidates
##### Advanced to general

* Phil Jennerjahn, political consultant, candidate for Mayor of Los Angeles in 2009 and for the 33rd District in 2010

##### Eliminated in primary

* Garen Mailyan, security officer
* Jenny Worman, actress and Hollywood stand-in

#### Campaign

Schiff was endorsed by the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO
Organizations
* Blue Dog Coalition
Organizations
* Republican Liberty Caucus

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Adam Schiff (incumbent) | 42,797 | 59.0 |
| | Republican | Phil Jennerjahn | 12,633 | 17.4 |
| | Republican | Jenny Worman | 5,978 | 8.2 |
| | Republican | Garen Mailyan | 3,749 | 5.2 |
| | Democratic | Sal Genovese | 2,829 | 3.9 |
| | Democratic | Massie Munroe | 2,437 | 3.4 |
| | Democratic | Jonathan Ryan Kalbfeld | 2,119 | 2.9 |
| Total votes | Total votes | Total votes | 72,542 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Blue Dog Coalition
* Human Rights Campaign
* National Organization for Women
* Sierra Club

#### Results

California's 28th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Adam Schiff (incumbent) | 188,703 | 76.5 |
| | Republican | Phil Jennerjahn | 58,008 | 23.5 |
| Total votes | Total votes | Total votes | 246,711 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 29

The 29th district is based in the northeastern San Fernando Valley. This new district had no incumbent.

### Primary election
#### Democratic candidates
##### Advanced to general

* Tony Cardenas, member of the Los Angeles City Council

##### Eliminated in primary

* Richard Valdez, businessman

##### Declined

* Howard Berman, incumbent U.S. Representative for the 28th district

#### Republican candidates

No Republicans filed.

#### Independent candidates
##### Advanced to general

* David Hernandez, president of the San Fernando Chamber of Commerce

#### Campaign

Cardenas received the endorsement of the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Tony Cardenas | 24,882 | 64.4 |
| | No party preference | David R. Hernandez | 8,382 | 21.7 |
| | Democratic | Richard Valdez | 5,379 | 13.9 |
| Total votes | Total votes | Total votes | 38,643 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Democratic Congressional Campaign Committee "Majority Makers" Program
* Human Rights Campaign

#### Results

California's 29th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Tony Cardenas | 111,287 | 74.1 |
| | No party preference | David R. Hernandez | 38,994 | 25.9 |
| Total votes | Total votes | Total votes | 150,281 | 100.0 |
| | Democratic win (new seat) | Democratic win (new seat) | Democratic win (new seat) | Democratic win (new seat) |

## District 30

The 30th district is based in the western San Fernando Valley and includes Sherman Oaks. Democrat Brad Sherman, who represented the 27th district from 2003 to 2013 and the 24th district from 1997 to 2003, ran for re-election against fellow Democrat Howard Berman, who represented the 28th district from 2003 to 2013 and the 26th district from 1983 to 2003.

### Primary election
#### Democratic candidates
##### Advanced to general

* Howard Berman, incumbent U.S. Representative for the 28th district
* Brad Sherman, incumbent U.S. Representative for the 27th district

##### Eliminated in primary

* Vince Gilmore

#### Republican candidates
##### Eliminated in primary

* Mark Reed, actor, rancher and businessman
* Susan Shelley, novelist
* Navraj Singh, businessman and restaurateur

#### Campaign

At the California Democratic Party's annual convention in February 2012, Sherman received the support of more delegates than Berman, but did not reach the 60-percent threshold necessary to receive the party's endorsement. In March 2012, the California Republican Party declined to endorse any candidate while the Los Angeles County party endorsed Reed.

#### Endorsements

Organizations
* Republican Liberty Caucus

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Howard Berman (D) | Vince Gilmore (D) | Michael Powelson (G) | Mark Reed (R) | Susan Shelley (R) | Brad Sherman (D) | Navraj Singh (R) | Undecided |
| M4 Strategies/Tulchin Research | May 29–31, 2012 | 329 (LV) | ± 5.4% | 24% | 1% | 4% | 10% | 2% | 32% | 4% | 23% |
| Feldman (D-Sherman) | March 26–28, 2012 | 500 (LV) | ± 4.4% | 17% | 1% | 4% | 12% | 5% | 40% | 2% | 20% |
| Feldman (D-Sherman) | August 14–18, 2011 | 600 (LV) | ± 5.0% | 17% | — | — | 26% | — | 42% | — | 15% |

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Brad Sherman (incumbent) | 40,589 | 42.4 |
| | Democratic | Howard Berman (incumbent) | 31,086 | 32.5 |
| | Republican | Mark Reed | 11,991 | 12.5 |
| | Republican | Navraj Singh | 5,521 | 5.8 |
| | Republican | Susan Shelley | 3,878 | 4.0 |
| | Green | Michael W. Powelson | 1,976 | 2.1 |
| | Democratic | Vince Gilmore | 792 | 0.8 |
| Total votes | Total votes | Total votes | 95,833 | 100.0 |

### General election
#### Campaign

The campaign was one of the most expensive in the nation.

#### Endorsements

U.S. Senators
* Barbara Boxer, United States Senator from California
* Dianne Feinstein, United States Senator from California
* Lindsey Graham, United States Senator from South Carolina (Republican)
* Joe Lieberman, former United States Senator from Connecticut (Independent)
* John McCain, United States Senator from Arizona (Republican)
U.S. Representatives
* Xavier Becerra, U.S. Representative from CA-31
* Mary Bono, U.S. Representative from CA-45 (Republican)
* Ken Calvert, U.S. Representative from CA-44 (Republican)
* Dennis Cardoza, U.S. Representative from CA-18
* Jim Costa, U.S. Representative from CA-20
* David Dreier, U.S. Representative from CA-26 (Republican)
* Bob Filner, U.S. Representative from CA-51
* Elton Gallegly, U.S. Representative from CA-24 (Republican)
* John Garamendi, U.S. Representative from CA-10
* Wally Herger, U.S. Representative from CA-02 (Republican)
* Steny Hoyer, U.S. Representative from MD-05
* Darrell Issa, U.S. Representative from CA-49 (Republican)
* Barbara Lee, U.S. Representative from CA-09
* Jerry Lewis, U.S. Representative from CA-41 (Republican)
* Dan Lungren, U.S. Representative from CA-03 (Republican)
* George Miller, U.S. Representative from CA-07
* Lucille Roybal-Allard, U.S. Representative from CA-34
* Ed Royce, U.S. Representative from CA-40 (Republican)
* Loretta Sanchez, U.S. Representative from CA-47
* Mike Thompson, U.S. Representative from CA-01
* Maxine Waters, U.S. Representative from CA-35
* Henry Waxman, U.S. Representative from CA-30
* Lynn Woolsey, U.S. Representative from CA-06
State officials
* Jerry Brown, Governor of California
Labor unions
* International Alliance of Theatrical Stage Employees
Organizations
* Humane Society Legislative Fund
Newspapers
* Los Angeles Daily News
* The Los Angeles Times
Municipal officials
* Antonio Villaraigosa, Mayor of Los Angeles
Individuals
* David Geffen, businessman and film producer
* Rafer Johnson, actor and decathlete
* Jeffrey Katzenberg, film producer
* Wendie Malick, actress and model
* Steven Spielberg, director
* Betty White, actress
Executive officials
* Bill Clinton, 42nd President of the United States
U.S. Representatives
* Judy Chu, U.S. Representative from CA-32
* Grace Napolitano, U.S. Representative from CA-38
State officials
* Cruz Bustamante, former Lieutenant Governor of California
* John Chiang, California State Treasurer
* Gavin Newsom, Lieutenant Governor of California
Labor unions
* International Brotherhood of Boilermakers
* United Steelworkers
Organizations
* Armenian National Committee of America
Municipal officials
* Dennis Zine, Los Angeles City Councillor

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Howard Berman (D) | Brad Sherman (D) | Undecided |
| SurveyUSA | October 22–24, 2012 | 674 (LV) | ± 3.9% | 33% | 44% | 22% |
| Feldman (D-Sherman) | October 11–14, 2012 | 502 (LV) | ± 4.4% | 26% | 51% | 24% |
| Kimball Political Consulting (R) | October 12–13, 2012 | 422 (LV) | ± 4.7% | 26% | 32% | 42% |
| SurveyUSA | September 18–20, 2012 | 628 (LV) | ± 4.0% | 32% | 45% | 23% |
| Feldman (D-Sherman) | July 14–18, 2012 | 502 (LV) | ± 4.4% | 29% | 46% | 26% |
| Feldman (D-Sherman) | March 26–28, 2012 | 500 (LV) | ± 4.4% | 26% | 51% | 23% |
| Feldman (D-Sherman) | August 14–18, 2011 | 600 (LV) | ± 5.0% | 25% | 52% | 23% |

#### Results

California's 30th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Brad Sherman (incumbent) | 149,456 | 60.3 |
| | Democratic | Howard Berman (incumbent) | 98,395 | 39.7 |
| Total votes | Total votes | Total votes | 247,851 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 31

The 31st district is based in the Inland Empire and includes San Bernardino and Rancho Cucamonga. Republicans David Dreier, who represented the 26th district from 2003 to 2013 and its predecessors since 1981, and Jerry Lewis, who represented the 41st district from 2003 to 2013 and its predecessors since 1979, retired. Republican Gary Miller, who represented the 42nd district from 2003 to 2013 and the 41st district from 1999 to 2003, ran for re-election here.

### Primary election
#### Republican candidates
##### Advanced to general

* Robert Dutton, state senator
* Gary Miller, incumbent U.S. Representative

##### Declined

* David Dreier, incumbent U.S. Representative for the 26th district
* Jerry Lewis, incumbent U.S. Representative for the 41st district
* Michael Ramos, San Bernardino County district attorney

#### Democratic candidates
##### Eliminated in primary

* Pete Aguilar, Mayor of Redlands
* Justin Kim, former congressional oversight lawyer
* Rita Ramirez-Dean, community college trustee
* Renea Wickman, founder of a youth nonprofit organization,

##### Declined

* Joe Baca, incumbent U.S. Representative for the 43rd district
* Joe Baca, Jr., former state assembly member
* Russ Warner, businessman and nominee for the 26th district in 2008 & 2010

#### Campaign

At its February 2012 convention, the California Democratic Party did not endorse a candidate in the 31st district, while Miller was endorsed by the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Gary Miller (incumbent) | 16,708 | 26.7 |
| | Republican | Robert Dutton | 15,557 | 24.8 |
| | Democratic | Pete Aguilar | 14,181 | 22.6 |
| | Democratic | Justin Kim | 8,487 | 13.5 |
| | Democratic | Renea Wickman | 4,188 | 6.7 |
| | Democratic | Rita Ramirez-Dean | 3,546 | 5.7 |
| Total votes | Total votes | Total votes | 62,667 | 100.0 |

### General election
#### Endorsements

Organizations
* Campaign for Working Families
* National Republican Congressional Committee "Patriot" Program
* National Right to Life Committee
* NRA Political Victory Fund
* United States Chamber of Commerce

#### Results

California's 31st congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Gary Miller (incumbent) | 88,964 | 55.2 |
| | Republican | Robert Dutton | 72,255 | 44.8 |
| Total votes | Total votes | Total votes | 161,219 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 32

The 32nd district is based in the San Gabriel Valley and includes El Monte and West Covina. Republican David Dreier, who represented the 26th district from 2003 to 2013 and its predecessors since 1978, retired. Democrat Grace Napolitano, who represented the 38th district from 2003 to 2013 and the 34th district from 1999 to 2003, ran for re-election here.

### Primary election
#### Democratic candidates
##### Advanced to general

* Grace Napolitano, incumbent U.S. Representative

##### Eliminated in primary

* Bill Gonzalez, former Deputy State Director and Senior Advisor to U.S. Senator Dianne Feinstein

##### Withdrawn

* Roger Hernandez, state assembly member
* Norma Macias, El Monte council member

##### Declined

* Linda Sánchez, incumbent U.S. Representative for the 39th district

#### Republican candidates
##### Advanced to general

* David Miller, CEO of Pacific Development Incorporated

#### Campaign

Napolitano was endorsed by the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Grace Napolitano (incumbent) | 24,094 | 46.1 |
| | Republican | David Miller | 21,843 | 41.8 |
| | Democratic | G. Bill Gonzalez | 6,322 | 12.1 |
| Total votes | Total votes | Total votes | 52,259 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Sierra Club

#### Results

California's 32nd congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Grace Napolitano (incumbent) | 124,903 | 65.7 |
| | Republican | David Miller | 65,208 | 34.3 |
| Total votes | Total votes | Total votes | 190,111 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 33

The 33rd district is based in coastal Los Angeles County and includes Beverly Hills and Santa Monica. Democrat Henry Waxman, who represented the 30th district from 2003 to 2013 and the 24th and 29th districts from 1975 to 1993 and 1993 to 2003 respectively, ran for re-election here.

### Primary election
#### Democratic candidates
##### Advanced to general

* Henry Waxman, incumbent U.S. Representative

##### Eliminated in primary

* Bruce Margolin, attorney
* Zein Obagi, attorney
* Tim Pape

#### Republican candidates
##### Eliminated in primary

* Christopher David, entrepreneur

#### Independent candidates
##### Advanced to general

* Bill Bloomfield, businessman

#### Green candidates
##### Eliminated in primary

* David Steinman

#### Libertarian candidates
##### Eliminated in primary

* Steve Collett, certified public accountants

#### Campaign

Waxman received the endorsement of the California Democratic Party in February 2012. In March 2012, the California Republican Party declined to endorse David.

#### Endorsements

Labor unions
* AFL-CIO
Organizations
* Republican Liberty Caucus

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Henry Waxman (incumbent) | 51,235 | 45.3 |
| | No party preference | Bill Bloomfield | 27,850 | 24.6 |
| | Republican | Christopher David | 17,264 | 15.3 |
| | Democratic | Bruce Margolin | 5,020 | 4.4 |
| | Libertarian | Steve Collett | 4,916 | 4.3 |
| | Green | David William Steinman | 3,940 | 3.5 |
| | Democratic | Zein E. Obagi | 1,988 | 1.8 |
| | Democratic | Tim Pape | 847 | 0.7 |
| Total votes | Total votes | Total votes | 113,060 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Sierra Club

#### Results

California's 33rd congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Henry Waxman (incumbent) | 171,860 | 54.0 |
| | No party preference | Bill Bloomfield | 146,660 | 46.0 |
| Majority | Majority | Majority | 25,200 | 8.0 |
| Total votes | Total votes | Total votes | 318,520 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 34

The 34th district is based in central Los Angeles and includes Chinatown and Downtown Los Angeles. Democrat Xavier Becerra, who represented the 31st district from 2003 to 2013 and the 30th district from 1993 to 2003, ran for re-election here.

### Democratic candidates
#### Advanced to general

* Xavier Becerra, incumbent U.S. Representative

### Primary election
#### Republican candidates
##### Advanced to general

* Stephen Smith, former Radio Shack employee

#### Campaign

Becerra was endorsed by the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Xavier Becerra (incumbent) | 27,939 | 77.3 |
| | Republican | Stephen C. Smith | 5,739 | 16.0 |
| | Peace and Freedom | Howard Johnson | 2,407 | 6.7 |
| Total votes | Total votes | Total votes | 36,085 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* Sierra Club

#### Results

California's 34th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Xavier Becerra (incumbent) | 120,367 | 85.6 |
| | Republican | Stephen C. Smith | 20,223 | 14.4 |
| Total votes | Total votes | Total votes | 140,590 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 35

The 35th district is based in the Inland Empire and includes Fontana, Ontario, and Pomona. Democrat Joe Baca, who represented the 43rd district from 2003 to 2013 and the 42nd district from 1999 to 2003, ran for re-election here.

### Primary election
#### Democratic candidates
##### Advanced to general

* Joe Baca, incumbent U.S. Representative
* Gloria Negrete McLeod, state senator

#### Green candidates
##### Eliminated in primary

* Anthony Vieyra, former IRS employee

#### Campaign

Baca was endorsed by the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO
Organizations
* Blue Dog Coalition

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Joe Baca (incumbent) | 15,388 | 45.0 |
| | Democratic | Gloria Negrete McLeod | 12,425 | 36.3 |
| | Green | Anthony W. Vieyra | 6,372 | 18.6 |
| Total votes | Total votes | Total votes | 34,185 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Blue Dog Coalition
* Human Rights Campaign
Organizations
* EMILY's List

#### Results

California's 35th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Gloria Negrete McLeod | 79,698 | 55.9 |
| | Democratic | Joe Baca (incumbent) | 62,982 | 44.1 |
| Total votes | Total votes | Total votes | 142,680 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 36

The 36th district is based in eastern Riverside County and includes Palm Springs. Republican Mary Bono Mack, who represented the 45th district from 2003 to 2013 and the 44th district from 1998 to 2003, ran for re-election here.

### Primary election
#### Republican candidates
##### Advanced to general

* Mary Bono Mack, incumbent U.S. Representative

#### Democratic candidates
##### Advanced to general

* Raul Ruiz, physician

##### Declined

* Manuel Pérez, state assembly member
* Steve Pougnet, Mayor of Palm Springs and nominee for the 45th district in 2010

#### Campaign

Ruiz received the endorsement of the California Democratic Party in February 2012. Bono Mack was endorsed by the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Mary Bono Mack (incumbent) | 52,474 | 58.1 |
| | Democratic | Raul Ruiz | 37,847 | 41.9 |
| Total votes | Total votes | Total votes | 90,321 | 100.0 |

### General election
#### Endorsements

Organizations
* GOProud
* Maggie's List
* NRA Political Victory Fund
* United States Chamber of Commerce
Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Democracy for America
* Democratic Congressional Campaign Committee "Red to Blue" Program
* National Organization for Women
* Sierra Club

#### Debates

* Complete video of debate, October 12, 2012

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Mary Bono Mack (R) | Raul Ruiz (D) | Undecided |
| Lake Research Partners (D-Ruiz) | October 20–22, 2012 | 402 (LV) | ± 4.9% | 42% | 48% | 7% |
| Public Policy Polling (D-Democracy for America) | October 12–14, 2012 | 1,364 (LV) | ± 2.7% | 46% | 47% | 7% |
| Lake Research Partners (D-Ruiz) | October 2–4, 2012 | 406 (LV) | ± 4.9% | 43% | 46% | 9% |
| Public Policy Polling (D-Democracy for America) | September 12–13, 2012 | 1,281 (LV) | ± 2.7% | 47% | 44% | 9% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Tossup | November 5, 2012 |
| Rothenberg | Tilts R | November 2, 2012 |
| Roll Call | Tossup | November 4, 2012 |
| Sabato's Crystal Ball | Lean R | November 5, 2012 |
| NY Times | Lean R | November 4, 2012 |
| RCP | Tossup | November 4, 2012 |
| The Hill | Tossup | November 4, 2012 |

#### Results

California's 36th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Raul Ruiz | 110,189 | 52.9 |
| | Republican | Mary Bono Mack (incumbent) | 97,953 | 47.1 |
| Majority | Majority | Majority | 12,236 | 5.8 |
| Total votes | Total votes | Total votes | 208,142 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## District 37

The 37th district is based in West Los Angeles and includes Crenshaw and Culver City. Democrat Karen Bass, who represented the 33rd district from 2011 to 2013, ran for re-election here.

### Primary election
#### Democratic candidates
##### Advanced to general

* Karen Bass, incumbent U.S. Representative

##### Withdrawn

* Mervin Evans

##### Declined

* Maxine Waters, incumbent U.S. Representative for the 35th district

#### Republican candidates
##### Advanced to general

* Morgan Osborne (write-in)

#### Campaign

Bass was endorsed by the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Karen Bass (incumbent) | 54,345 | 99.9 |
| | Republican | Morgan Osborne (write-in) | 36 | 0.1 |
| | Peace and Freedom | Adam Shbeita (write-in) | 8 | 0.0 |
| | Libertarian | Sean P. McGray (write-in) | 4 | 0.0 |
| Total votes | Total votes | Total votes | 54,393 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* National Organization for Women
* Sierra Club

#### Results

California's 37th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Karen Bass (incumbent) | 207,039 | 86.4 |
| | Republican | Morgan Osborne | 32,541 | 13.6 |
| Total votes | Total votes | Total votes | 239,580 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 38

The 38th district is based in the eastern Los Angeles suburbs and includes Norwalk and Whittier. Democrat Linda Sánchez, who represented the 39th district from 2003 to 2013, ran for re-election here.

### Primary election
#### Democratic candidates
##### Advanced to general

* Linda Sánchez, incumbent U.S. Representative

##### Withdrawn

* Ronald Calderon, state senator

##### Declined

* Grace Napolitano, incumbent U.S. Representative for the 38th district

#### Republican candidates
##### Advanced to general

* Benjamin Campos, certified public accountant

##### Eliminated in primary

* Jorge Robles, law enforcement professional

#### Campaign

Sánchez received the endorsement of the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Linda Sánchez (incumbent) | 33,223 | 56.0 |
| | Republican | Benjamin Campos | 13,363 | 22.5 |
| | Republican | Jorge Robles | 12,713 | 21.4 |
| Total votes | Total votes | Total votes | 59,299 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Sierra Club

#### Results

California's 38th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Linda Sánchez (incumbent) | 145,280 | 67.5 |
| | Republican | Benjamin Campos | 69,807 | 32.5 |
| Total votes | Total votes | Total votes | 215,087 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 39

The 39th district straddles the Los Angeles–Orange county border and includes Chino Hills, Diamond Bar, and Fullerton. Republican Ed Royce, who represented the 40th district from 2003 to 2013 and the 39th district from 1993 to 2003, ran for re-election here.

### Primary election
#### Republican candidates
##### Advanced to general

* Ed Royce, incumbent U.S. Representative

#### Democratic candidates
##### Advanced to general

* Jay Chen, member of the Hacienda La Puente Unified School District board

#### Campaign

Chen was endorsed by the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Ed Royce (incumbent) | 62,874 | 66.3 |
| | Democratic | Jay Chen | 28,457 | 30.0 |
| | No party preference | D'Marie Mulattieri | 3,561 | 3.8 |
| Total votes | Total votes | Total votes | 94,892 | 100.0 |

### General election
#### Endorsements

Organizations
* National Right to Life Committee
* NRA Political Victory Fund
* United States Chamber of Commerce
Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers

#### Results

California's 39th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Ed Royce (incumbent) | 145,607 | 57.8 |
| | Democratic | Jay Chen | 106,360 | 42.2 |
| Majority | Majority | Majority | 39,247 | 15.6 |
| Total votes | Total votes | Total votes | 251,967 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

#### Aftermath

Jay Chen did much better than previous Royce opponents among the Asian American community, earning 62% of the overall Asian American vote, and 95% of the Chinese American vote.

## District 40

The 40th district is based in central Los Angeles County and includes Downey and East Los Angeles. Democrat Lucille Roybal-Allard, who represented the 34th district from 2003 to 2013 and the 33rd district from 1993 to 2003, ran for re-election here.

### Primary election
#### Democratic candidates
##### Advanced to general

* Lucille Roybal-Allard, incumbent U.S. Representative
* David Sanchez, civil rights activist

##### Declined

* Linda Sánchez, incumbent U.S. Representative for the 39th district

#### Republican candidates

No Republicans filed.

#### Campaign

Roybal-Allard received the endorsement of the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Lucille Roybal-Allard (incumbent) | 16,596 | 65.4 |
| | Democratic | David Sanchez | 8,777 | 34.6 |
| Total votes | Total votes | Total votes | 25,373 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Sierra Club

#### Results

California's 40th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Lucille Roybal-Allard (incumbent) | 73,940 | 58.9 |
| | Democratic | David Sanchez | 51,613 | 41.1 |
| Total votes | Total votes | Total votes | 125,553 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 41

The 41st district is based in the Inland Empire and includes Moreno Valley, Perris, and Riverside. This new district had no incumbent.

### Primary election
#### Democratic candidates
##### Advanced to general

* Mark Takano, member of the Riverside Community College District Board of Trustees

##### Eliminated in primary

* Anna Nevenic, nurse

#### Republican candidates
##### Advanced to general

* John Tavaglione, Riverside County Supervisor

##### Eliminated in primary

* George Pearne
* Vince Sawyer, Oath Keeper

##### Declined

* Jeff Miller, state assembly member

#### Campaign

Takano was endorsed by the California Democratic Party in February 2012. Tavaglione received the endorsement of the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | John Tavaglione | 25,379 | 44.6 |
| | Democratic | Mark Takano | 20,860 | 36.7 |
| | Democratic | Anna Nevenic | 4,991 | 8.8 |
| | Republican | Vince Sawyer | 4,723 | 8.3 |
| | Republican | George Pearne | 956 | 1.7 |
| Total votes | Total votes | Total votes | 56,909 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Democracy for America
* Democratic Congressional Campaign Committee "Red to Blue" Program
* Human Rights Campaign
* Progressive Change Campaign Committee
* Sierra Club
Organizations
* National Republican Congressional Committee "Young Guns" Program
* NRA Political Victory Fund
* United States Chamber of Commerce

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Mark Takano (D) | John Tavaglione (R) | Undecided |
| EMC Research (D-Takano) | August 8–12, 2012 | 500 (LV) | ± 4.5% | 42% | 38% | 20% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Lean D | November 5, 2012 |
| Rothenberg | Lean D | November 2, 2012 |
| Roll Call | Lean D | November 4, 2012 |
| Sabato's Crystal Ball | Lean D | November 5, 2012 |
| NY Times | Tossup | November 4, 2012 |
| RCP | Lean D | November 4, 2012 |
| The Hill | Lean D | November 4, 2012 |

#### Results

California's 41st congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mark Takano | 103,578 | 59.0 |
| | Republican | John Tavaglione | 72,074 | 41.0 |
| Majority | Majority | Majority | 31,504 | 18.0 |
| Total votes | Total votes | Total votes | 175,652 | 100.0 |
| | Democratic win (new seat) | Democratic win (new seat) | Democratic win (new seat) | Democratic win (new seat) |

## District 42

The 42nd district is based in the Inland Empire and includes Corona and Murrieta. Republican Ken Calvert, who represented the 44th district from 2003 to 2013 and the 43rd district from 1993 to 2003, ran for re-election here.

### Primary election
#### Republican candidates
##### Advanced to general

* Ken Calvert, incumbent U.S. Representative

##### Eliminated in primary

* Eva Johnson, former division director Western Municipal Water District
* Clayton Thibodeau, author and entrepreneur

#### Democratic candidates
##### Advanced to general

* Michael Williamson, attorney

##### Eliminated in primary

* Cliff Smith

#### Campaign

Calvert was endorsed by the California Republican Party in March 2012.

#### Endorsements

Organizations
* Republican Liberty Caucus

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Ken Calvert (incumbent) | 35,392 | 51.3 |
| | Democratic | Michael Williamson | 9,860 | 14.3 |
| | Democratic | Cliff Smith | 7,377 | 10.7 |
| | Republican | Clayton Thibodeau | 6,374 | 9.2 |
| | Republican | Eva Johnson | 5,678 | 8.2 |
| | No party preference | Curt Novak | 4,254 | 6.2 |
| Total votes | Total votes | Total votes | 68,935 | 100.0 |

### General election
#### Endorsements

Organizations
* National Right to Life Committee
* NRA Political Victory Fund
* United States Chamber of Commerce

#### Results

California's 42nd congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Ken Calvert (incumbent) | 130,245 | 60.6 |
| | Democratic | Michael Williamson | 84,702 | 39.4 |
| Total votes | Total votes | Total votes | 214,947 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 43

The 43rd district is based in South Los Angeles and includes Hawthorne and Inglewood. Democrat Maxine Waters, who represented the 35th district from 1993 to 2013 and the 29th district from 1991 to 1993, ran for re-election here.

### Primary election
#### Democratic candidates
##### Advanced to general

* Bob Flores, self-employed communications manager
* Maxine Waters, incumbent U.S. Representative

#### Republican candidates
##### Withdrawn

* Marco Antonio Leal

#### Campaign

Waters received the endorsement of the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Maxine Waters (incumbent) | 36,062 | 65.4 |
| | Democratic | Bob Flores | 19,061 | 34.6 |
| Total votes | Total votes | Total votes | 55,123 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Sierra Club

#### Results

California's 43rd congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Maxine Waters (incumbent) | 143,123 | 71.2 |
| | Democratic | Bob Flores | 57,771 | 28.8 |
| Total votes | Total votes | Total votes | 200,894 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 44

The 44th district is based in south Los Angeles County and includes Carson, Compton, and San Pedro. Democrat Janice Hahn, who represented the 36th district from 2011 to 2013, ran for re-election against fellow Democrat Laura Richardson, who represented the 37th district from 2007 to 2013.

### Primary election
#### Democratic candidates
##### Advanced to general

* Janice Hahn, incumbent U.S. Representative for the 36th district
* Laura Richardson, incumbent U.S. Representative for the 37th district

##### Declined

* Isadore Hall, state assembly member

#### Republican candidates
##### Withdrawn

* John Lauro

#### Campaign

In February 2012, Hahn became the officially endorsed candidate of the California Democratic Party.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Janice Hahn (incumbent) | 24,843 | 60.1 |
| | Democratic | Laura Richardson (incumbent) | 16,523 | 39.9 |
| Total votes | Total votes | Total votes | 41,366 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
Organizations
* National Organization for Women
* Sierra Club

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Janice Hahn (D) | Laura Richardson (D) | Undecided |
| Fairbank, Maslin, Maullin, Metz & Associates (D-Hahn) | September 26–29, 2012 | 350 (LV) | ± 5.3% | 42% | 27% | 30% |
| SurveyUSA | September 20–23, 2012 | 613 (LV) | ± 4.0% | 43% | 33% | 24% |

#### Results

California's 44th congressional district primary election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Janice Hahn (incumbent) | 99,909 | 60.2 |
| | Democratic | Laura Richardson (incumbent) | 65,989 | 39.8 |
| Total votes | Total votes | Total votes | 165,898 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 45

The 45th district is based in inland Orange County and includes Irvine and Mission Viejo. Republican John Campbell, who represented the 48th district from 2005 to 2013, ran for re-election here.

### Primary election
#### Republican candidates
##### Advanced to general

* John Campbell, incumbent U.S. Representative

##### Eliminated in primary

* John Webb, a small businessman

#### Democratic candidates
##### Advanced to general

* Sukhee Kang, Mayor of Irvine

#### Campaign

Kang was endorsed by the California Democratic Party in February 2012. Campbell received the endorsement of the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | John Campbell (incumbent) | 54,346 | 51.0 |
| | Democratic | Sukhee Kang | 35,182 | 33.0 |
| | Republican | John Webb | 17,014 | 16.0 |
| Total votes | Total votes | Total votes | 106,542 | 100.0 |

### General election
#### Endorsements

Organizations
* National Right to Life Committee
* NRA Political Victory Fund
* United States Chamber of Commerce
Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
Organizations
* Sierra Club

#### Results

California's 45th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | John Campbell (incumbent) | 171,417 | 58.5 |
| | Democratic | Sukhee Kang | 121,814 | 41.5 |
| Majority | Majority | Majority | 49,603 | 17.0 |
| Total votes | Total votes | Total votes | 293,231 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 46

The 46th district is based in central Orange County and includes Anaheim and Santa Ana. Democrat Loretta Sanchez, who represented the 47th district from 2003 to 2013 and the 46th district from 1997 to 2003, ran for re-election here.

### Primary election
#### Democratic candidates
##### Advanced to general

* Loretta Sanchez, incumbent U.S. Representative

#### Republican candidates
##### Advanced to general

* Jerry Hayden, independent businessman

##### Eliminated in primary

* John H. Cullum, accountant
* Pat Garcia, escrow company owner

#### Independent candidates
##### Eliminated in primary

Jorge Rocha, tax accountant

#### Campaign

Sanchez received the endorsement of the California Democratic Party in February 2012. Hayden was endorsed by the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO
Organizations
* Blue Dog Coalition
* National Organization for Women
* Sierra Club

#### Results

California's 46th congressional district election, 2012 :
| Primary election |||||
| Party | Party | Candidate | Votes | % |
| | Democratic | Loretta Sanchez (incumbent) | 25,706 | 52.1 |
| | Republican | Jerry Hayden | 14,571 | 29.5 |
| | Republican | John J. Cullum | 5,251 | 10.6 |
| | No party preference | Jorge Rocha | 1,969 | 4.0 |
| | Republican | Pat Garcia | 1,852 | 3.8 |
| Total votes | Total votes | Total votes | 49,349 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Blue Dog Coalition
* Human Rights Campaign
* National Organization for Women

#### Results

California's 46th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Loretta Sanchez (incumbent) | 95,694 | 63.9 |
| | Republican | Jerry Hayden | 54,121 | 36.1 |
| Total votes | Total votes | Total votes | 149,815 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 47

The 47th district includes Long Beach and parts of Orange County. This new district had no incumbent.

### Primary election
#### Democratic candidates
##### Advanced to general

* Alan Lowenthal, state senator

##### Eliminated in primary

* Peter Mathews, professor
* Jay Shah
* Usha Shah

##### Declined

* Joe Dunn, former state senator
* Linda Sánchez, incumbent U.S. Representative

#### Republican candidates
##### Advanced to general

* Gary DeLong, Long Beach City Council member

##### Eliminated in primary

* Steve Foley, conservative blogger, activist and campaign consultant
* Steven T. Kuykendall, former U.S. Representative

##### Declined

* Troy Edgar, Mayor of Los Alamitos and former member of the Los Alamitos City Council

#### Campaign

Lowenthal was endorsed by the California Democratic Party in February 2012. Delong received the endorsement of the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Alan Lowenthal | 27,356 | 33.8 |
| | Republican | Gary DeLong | 23,831 | 29.4 |
| | Republican | Steven T. Kuykendall | 8,769 | 10.8 |
| | Democratic | Peter Mathews | 7,951 | 9.8 |
| | Republican | Steve Foley | 5,848 | 7.2 |
| | Republican | Sanford W. Kahn | 2,563 | 3.2 |
| | Democratic | Usha Shah | 2,350 | 2.9 |
| | Democratic | Jay Shah | 2,273 | 2.8 |
| Total votes | Total votes | Total votes | 80,941 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Democratic Congressional Campaign Committee "Red to Blue" Program
* Human Rights Campaign
* National Organization for Women
* Sierra Club
Organizations
* GOProud
* National Republican Congressional Committee "Young Guns" Program
* NRA Political Victory Fund
* United States Chamber of Commerce

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Alan Lowenthal (D) | Gary DeLong (R) | Undecided |
| Goodwin Simon Strategic Research | August 16–18, 2012 | 400 (LV) | ± 5.0% | 51% | 31% | 18% |
| DCCC (D) | July 18, 2012 | 379 (LV) | ± 5.0% | 47% | 36% | 17% |
| Probolsky Research (R-DeLong) | June 28–July 3, 2012 | 400 (LV) | ± 4.9% | 44% | 41% | 15% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Likely D | November 5, 2012 |
| Rothenberg | Likely D | November 2, 2012 |
| Roll Call | Safe D | November 4, 2012 |
| Sabato's Crystal Ball | Likely D | November 5, 2012 |
| NY Times | Lean D | November 4, 2012 |
| RCP | Likely D | November 4, 2012 |
| The Hill | Likely D | November 4, 2012 |

#### Results

California's 47th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Alan Lowenthal | 130,093 | 56.6 |
| | Republican | Gary DeLong | 99,919 | 43.4 |
| Majority | Majority | Majority | 30,174 | 13.2 |
| Total votes | Total votes | Total votes | 230,012 | 100.0 |
| | Democratic win (new seat) | Democratic win (new seat) | Democratic win (new seat) | Democratic win (new seat) |

## District 48

The 48th district is based in coastal Orange County and includes Huntington Beach. Republican Dana Rohrabacher, who represented the 46th district from 2003 to 2013 and the 42nd and 45th districts from 1989 to 1993 and 1993 to 2003 respectively, ran for re-election here.

### Primary election
#### Republican candidates
##### Advanced to general

* Dana Rohrabacher, incumbent U.S. Representative

#### Democratic candidates
##### Advanced to general

* Ron Varasteh, scientist and engineer

#### Independent candidates
##### Eliminated in primary

* Alan Schlar, marketing executive

#### Campaign

Rohrabacher was endorsed by the California Republican Party in March 2012.

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Dana Rohrabacher (incumbent) | 73,302 | 66.3 |
| | Democratic | Ron Varasteh | 31,912 | 28.9 |
| | No party preference | Alan Schlar | 5,355 | 4.8 |
| Total votes | Total votes | Total votes | 110,569 | 100.0 |

### General election
#### Endorsements

Organizations
* National Right to Life Committee
* NRA Political Victory Fund
* United States Chamber of Commerce

#### Results

California's 48th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Dana Rohrabacher (incumbent) | 177,144 | 61.0 |
| | Democratic | Ron Varasteh | 113,358 | 39.0 |
| Total votes | Total votes | Total votes | 290,502 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 49

The 49th district is based in northern San Diego County and includes Carlsbad and Oceanside. Republican Darrell Issa, who had represented the 49th district since 2003 and the 48th district from 2001 to 2003, ran for re-election.

### Primary election
#### Republican candidates
##### Advanced to general

* Darrell Issa, incumbent U.S. Representative

#### Democratic candidates
##### Advanced to general

* Jerry Tetalman, realtor

#### Independent candidates
##### Eliminated in primary

* Dick Eiden, retired attorney and poet
* Albin Novinec, U.S. Marine

#### Campaign

Tetalman received the endorsement of the California Democratic Party in February 2012. Issa was endorsed by the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Darrell Issa (incumbent) | 71,329 | 61.1 |
| | Democratic | Jerry Tetalman | 35,816 | 30.7 |
| | No party preference | Dick Eiden | 7,988 | 6.8 |
| | No party preference | Albin Novinec | 1,626 | 1.4 |
| Total votes | Total votes | Total votes | 116,759 | 100.0 |

### General election
#### Endorsements

Organizations
* National Right to Life Committee
* NRA Political Victory Fund
* United States Chamber of Commerce
Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers

#### Results

California's 49th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Darrell Issa (incumbent) | 159,725 | 58.2 |
| | Democratic | Jerry Tetalman | 114,893 | 41.8 |
| Majority | Majority | Majority | 44,832 | 16.4 |
| Total votes | Total votes | Total votes | 274,618 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 50

The 50th district is based in inland San Diego County and includes Escondido and Santee. Republican Duncan D. Hunter, who represented the 52nd district from 2009 to 2013, ran for re-election here.

### Primary election
#### Republican candidates
##### Advanced to general

* Duncan D. Hunter, incumbent U.S. Representative

##### Eliminated in primary

* Terri Linnell, Tea Party activist and candidate for this seat in 2010

#### Democratic candidates
##### Advanced to general

* David Secor, retired clerk of the San Diego Superior Court

##### Eliminated in primary

* Connie Frankowiak, community activist and candidate for this seat in 2006 & 2010

#### Campaign

Hunter received the endorsement of the California Republican Party in March 2012.

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Duncan D. Hunter (incumbent) | 76,818 | 67.4 |
| | Democratic | David B. Secor | 19,142 | 16.8 |
| | Democratic | Connie Frankowiak | 8,553 | 7.5 |
| | Libertarian | Michael Benoit | 6,160 | 5.4 |
| | Republican | Terri Linnell | 3,275 | 2.9 |
| Total votes | Total votes | Total votes | 113,948 | 100.0 |

### General election
#### Endorsements

Labor unions
* International Brotherhood of Boilermakers
Organizations
* Campaign for Working Families
* National Right to Life Committee
* NRA Political Victory Fund
* United States Chamber of Commerce

#### Results

California's 50th congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Duncan D. Hunter (incumbent) | 174,838 | 67.7 |
| | Democratic | David B. Secor | 83,455 | 32.3 |
| Total votes | Total votes | Total votes | 258,293 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 51

The new 51st district runs along the border with Mexico and includes Imperial County and San Diego. Democrat Bob Filner, who represented the 51st district from 2003 to 2013 and the 50th district from 1993 until 2003, retired to run for mayor of San Diego.

### Primary election
#### Democratic candidates
##### Advanced to general

* Juan Vargas, state senator and candidate for this seat in 1992, 1996 & 2006

##### Eliminated in primary

* John Brooks, writer and retired federal employee
* Denise Moreno Ducheny, state senator
* Daniel Ramirez

##### Declined

* Bob Filner, incumbent U.S. Representative

#### Republican candidates
##### Advanced to general

* Michael Crimmins, high school principal, retired Marine Corps major and nominee for 53rd district in 2008 & 2010

##### Eliminated in primary

* Xanthi Gionis, businesswoman and author
* Bernard Portley, computer scientist

#### Campaign

Vargas was endorsed by the California Democratic Party in February 2012. Gionis received the endorsement of the California Republican Party in March 2012.
Vargas was predicted to face fellow Democratic state senator Denise Moreno Ducheny in the general election, but he spent some of his funds on mailers to help Republican Michael Crimmins, who he preferred to face in the general election in this heavily Democratic seat. Vargas spent $40–50,000 helping Crimmins, at least eight times more than Crimmins spent himself. The effort was successful as Crimmins finished 2,909 votes ahead of Ducheny.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Juan Vargas | 30,143 | 46.0 |
| | Republican | Michael Crimmins | 13,016 | 19.9 |
| | Democratic | Denise Moreno Ducheny | 10,107 | 15.4 |
| | Republican | Xanthi Gionis | 4,487 | 6.8 |
| | Democratic | John Brooks | 3,290 | 5.0 |
| | Democratic | Daniel C. "Danny" Ramirez | 2,794 | 4.3 |
| | Republican | Bernard Portley | 1,667 | 2.5 |
| Total votes | Total votes | Total votes | 65,504 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Democratic Congressional Campaign Committee "Majority Makers" Program

#### Results

Vargas won the general election in a landslide.
California's 51st congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Juan Vargas | 113,934 | 71.5 |
| | Republican | Michael Crimmins | 45,464 | 28.5 |
| Total votes | Total votes | Total votes | 159,398 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 52

The 52nd district is based in coastal San Diego and includes La Jolla and Poway. Republican Brian Bilbray, who represented the 50th district from 2006 to 2013 and previously served from 1995 until 2001, ran for re-election here.

### Primary election
#### Republican candidates
##### Advanced to general

* Brian Bilbray, incumbent U.S. Representative

##### Eliminated in primary

* Gene Hamilton Carswell, developer, builder and veteran
* Wayne Iverson, physician
* John Stahl, retired business executive and candidate for Florida's 22nd district in 1994
* John Subka, real estate investor

#### Democratic candidates
##### Advanced to general

* Scott Peters, chair of the Port of San Diego

##### Eliminated in primary

* Lori Saldaña, former state assembly member

##### Withdrawn

* Shirley Decourt-Park, business owner

##### Declined

* Bob Nascenzi, businessman

#### Campaign

At its February 2012 convention, the California Democratic Party declined to endorse a candidate for the 52nd district. Bilbray was endorsed by the California Republican Party in March 2012.

#### Endorsements

Labor unions
* AFL-CIO

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Brian Bilbray (incumbent) | 61,930 | 41.0 |
| | Democratic | Scott Peters | 34,106 | 22.6 |
| | Democratic | Lori Saldaña | 33,387 | 22.1 |
| | No party preference | Jack Doyle | 6,138 | 4.1 |
| | Republican | John K. Stahl | 5,502 | 3.6 |
| | Republican | Wayne Iverson | 4,476 | 3.0 |
| | Democratic | Shirley Decourt-Park | 2,368 | 1.6 |
| | No party preference | Ehab T. Shehata | 1,156 | 0.8 |
| | Republican | John L. Subka | 1,091 | 0.7 |
| | Republican | Gene Hamilton Carswell | 828 | 0.5 |
| Total votes | Total votes | Total votes | 150,982 | 100.0 |

### General election
#### Endorsements

Organizations
* National Republican Congressional Committee "Patriot" Program
* NRA Political Victory Fund
* United States Chamber of Commerce
Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Democratic Congressional Campaign Committee "Red to Blue" Program
* Human Rights Campaign
* National Organization for Women
* Sierra Club

#### Debate

2012 California's 52nd congressional district debate :
| No. | Date | Host | Moderator | Link | Republican | Democratic |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | | |
| Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Key: P Participant  A Absent  N Not invited  I Invited W Withdrawn | Brian Bilbray | Scott Peters |
| 1 | Oct. 10, 2012 | San Diego Union-Tribune | Michael Smolens | | P | P |

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Brian Bilbray (R) | Scott Peters (D) | Undecided |
| SurveyUSA | October 28–30, 2012 | 628 (LV) | ± 4.0% | 46% | 46% | 8% |
| Grove Insight (D-Peters) | October 19–21, 2012 | 400 (LV) | ± 4.9% | 40% | 45% | 15% |
| Glover Park Group/University of San Diego/U-T San Diego | October 14–17, 2012 | 374 (LV) | ± 5.0% | 47% | 38% | 13% |
| Grove Insight (D-Peters) | July 16–18, 2012 | 400 (LV) | ± 4.4% | 40% | 40% | 19% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Tossup | November 5, 2012 |
| Rothenberg | Tossup | November 2, 2012 |
| Roll Call | Tossup | November 4, 2012 |
| Sabato's Crystal Ball | Lean D (flip) | November 5, 2012 |
| NY Times | Tossup | November 4, 2012 |
| RCP | Tossup | November 4, 2012 |
| The Hill | Tossup | November 4, 2012 |

#### Results

California's 52nd congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Scott Peters | 151,451 | 51.2 |
| | Republican | Brian Bilbray (incumbent) | 144,495 | 48.8 |
| Majority | Majority | Majority | 6,956 | 2.4 |
| Total votes | Total votes | Total votes | 295,946 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

## District 53

The 53rd district is based in Central San Diego and includes La Mesa and Lemon Grove. Democrat Susan Davis, who had represented the 53rd district since 2003 and previously represented the 49th district from 2001 to 2003, ran for re-election here.

### Primary election
#### Democratic candidates
##### Advanced to general

* Susan Davis, incumbent U.S. Representative

#### Republican candidates
##### Advanced to general

* Nick Popaditch, retired United States Marine Corps gunnery sergeant and nominee for the 51st district in 2010

#### Campaign

Davis received the endorsement of the California Democratic Party in February 2012.

#### Endorsements

Labor unions
* AFL-CIO
Organizations
* Sierra Club

#### Results

Nonpartisan blanket primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Susan Davis (incumbent) | 70,462 | 57.8 |
| | Republican | Nick Popaditch | 51,423 | 42.2 |
| | Republican | Joel A. Marchese (write-in) | 7 | 0.0 |
| | Republican | John R. Edwards (write-in) | 3 | 0.0 |
| Total votes | Total votes | Total votes | 121,895 | 100.0 |

### General election
#### Endorsements

Labor unions
* AFL-CIO
* International Brotherhood of Boilermakers
* National Association of Letter Carriers
Organizations
* Human Rights Campaign
* National Organization for Women
* Sierra Club
Organizations
* Iraq Veterans for Congress

#### Results

California's 53rd congressional district election, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Susan Davis (incumbent) | 164,825 | 61.4 |
| | Republican | Nick Popaditch | 103,482 | 38.6 |
| Total votes | Total votes | Total votes | 268,307 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |