# 2020 United States House of Representatives elections in Iowa

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The 2020 United States House of Representatives elections in Iowa was held on November 3, 2020, to elect the four U.S. representatives from the state of Iowa, one from each of the state's four congressional districts. The elections coincided with the 2020 U.S. presidential election, as well as other elections to the House of Representatives, elections to the United States Senate and various state and local elections.

## Overview

| Party | Party | Candi- dates | Votes | Votes | Seats | Seats | Seats |
| Party | Party | Candi- dates | No. | % | No. | +/– | % |
| | Republican Party | 4 | 859,418 | 52.42% | 3 | 2 | 75.00% |
| | Democratic Party | 4 | 762,271 | 46.5% | 1 | 2 | 25.00% |
| | Libertarian Party | 1 | 15,361 | 0.94% | 0 | | 0.00% |
| | Write-in | | 2,413 | 0.15% | 0 | | 0.00% |
| Total | Total | 9 | 1,639,463 | 100.0% | 4 | | 100.00% |
Popular vote
Republican
52.42%
Democratic
46.5%
Other
1.09% :
House seats
Republican
75.00%
Democratic
25.00% :

### By district

| District | Republican | Republican | Democratic | Democratic | Others | Others | Total | Total | Result |
| District | Votes | % | Votes | % | Votes | % | Votes | % | Result |
| District 1 | 212,088 | 51.25% | 201,347 | 48.65% | 434 | 0.10% | 413,869 | 100% | Republican gain |
| District 2 | 196,964 | 49.912% | 196,958 | 49.910% | 703 | 0.178% | 394,625 | 100% | Republican gain |
| District 3 | 212,997 | 47.55% | 219,205 | 48.94% | 15,745 | 3.51% | 447,947 | 100% | Democratic hold |
| District 4 | 237,369 | 61.97% | 144,761 | 37.80% | 892 | 0.23% | 383,022 | 100% | Republican hold |
| Total | 859,418 | 52.42% | 762,271 | 46.50% | 17,774 | 1.08% | 1,639,463 | 100% | |

## District 1

The 1st district is based in northeastern Iowa, and includes the cities of Dubuque, Cedar Rapids and Waterloo. The incumbent was Democrat Abby Finkenauer, who flipped the district and was elected with 51.0% of the vote in 2018.

### Democratic primary
#### Candidates
##### Nominee

* Abby Finkenauer, incumbent U.S. representative

#### Endorsements

Former US Executive Branch officials
* Barack Obama, former president of the United States (2009–2017), former Senator from Illinois (2005–2008)
Federal officials
* Elizabeth Warren, U.S. senator from Massachusetts (2013-present), 2020 candidate for President
Organizations
* EMILY's List
* End Citizens United
* J Street PAC
* League of Conservation Voters Action Fund
* NARAL Pro-Choice America
* Planned Parenthood Action Fund
* Sierra Club

#### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Abby Finkenauer (incumbent) | 72,474 | 99.3 |
| | Write-in | Write-in | 482 | 0.7 |
| Total votes | Total votes | Total votes | 72,956 | 100.0 |

### Republican primary
#### Candidates
##### Nominee

* Ashley Hinson, state representative

##### Defeated in primary

* Thomas Hansen, farmer and businessman

##### Declined

* Rod Blum, former U.S. representative

#### Endorsements

State and local politicians
* Adam Gregg, Lieutenant Governor of Iowa
* Kim Reynolds, Governor of Iowa
Organizations
* Maggie's List
* Susan B. Anthony List

#### Results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Ashley Hinson | 38,552 | 77.8 |
| | Republican | Thomas Hansen | 10,845 | 21.9 |
| | Write-in | Write-in | 152 | 0.3 |
| Total votes | Total votes | Total votes | 49,549 | 100.0 |

### General election
#### Debate

2020 Iowa's 1st congressional district debate :
| No. | Date | Host | Moderator | Link | Democratic | Republican |
| 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 | Abby Finkenauer | Ashley Hinson |
| 1 | Sep. 7, 2020 | Iowa PBS | | | P | P |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Tossup | November 2, 2020 |
| Inside Elections | Lean D | October 28, 2020 |
| Sabato's Crystal Ball | Lean D | November 2, 2020 |
| Politico | Tossup | September 8, 2020 |
| Daily Kos | Lean D | October 15, 2020 |
| RCP | Tossup | October 13, 2020 |
| Niskanen | Lean D | July 26, 2020 |
| The Economist | Likely D | October 2, 2020 |

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Abby Finkenauer (D) | Ashley Hinson (R) | Other/ Undecided |
| Monmouth University | October 15–20, 2020 | 352 (RV) | ± 5.2% | 52% | 44% | 4% |
| Monmouth University | October 15–20, 2020 | 352 (LV) | ± 5.2% | 54% | 44% | – |
| Monmouth University | October 15–20, 2020 | 352 (LV) | ± 5.2% | 56% | 42% | – |
| Basswood Research (R) | September 26–28, 2020 | 400 (LV) | ± 4.9% | 45% | 45% | 10% |
| Monmouth University | July 25 – August 3, 2020 | 391 (RV) | ± 5% | 51% | 41% | 9% |
| Monmouth University | July 25 – August 3, 2020 | 391 (LV) | ± 5% | 52% | 41% | 8% |
| Monmouth University | July 25 – August 3, 2020 | 391 (LV) | ± 5% | 52% | 40% | 8% |
| Public Opinion Strategies (R) | March 3–5, 2020 | 400 (LV) | ± 4.0% | 45% | 44% | – |
| Harper Polling (R) | January 11–12, 2020 | 400 (LV) | ± 4.0% | 44% | 40% | 15% |
| Harper Polling (R) | January 11–12, 2020 | 400 (LV) | ± 4.0% | 40% | 48% | – |
Generic Democrat vs Generic Republican
| Poll source | Date(s) administered | Sample size | Margin of error | Generic Democrat | Generic Republican | Other | Undecided |
| Selzer & Co./Des Moines Register | October 26–29, 2020 | – (LV) | ± 7.1% | 36% | 51% | 9% | 5% |
| Selzer and Co./Des Moines Register | September 14–17, 2020 | – (LV) | ± 7.8% | 47% | 41% | – | – |
| Selzer and Co./Des Moines Register | June 7–10, 2020 | – (LV) | <= ± 7.7% | 48% | 42% | – | – |
| Public Opinion Strategies (R) | March 3–5, 2020 | 400 (LV) | ± 4% | 37% | 44% | – | – |
| Selzer and Co./Des Moines Register | March 2–5, 2020 | – (LV) | – | 46% | 49% | – | – |
| Harper Polling (R) | January 11–12, 2020 | 400 (LV) | ± 4% | 43% | 44% | – | – |

#### Results

Iowa's 1st congressional district, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Ashley Hinson | 212,088 | 51.2 |
| | Democratic | Abby Finkenauer (incumbent) | 201,347 | 48.7 |
| | Write-in | Write-in | 434 | 0.1 |
| Total votes | Total votes | Total votes | 413,869 | 100.0 |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

## District 2

The 2nd district encompasses southeastern Iowa, and is home to the cities of Davenport, Iowa City, Muscatine, Clinton, Burlington, Ottumwa, Fort Madison, Oskaloosa, Bettendorf, Newton and Pella. The incumbent was Democrat Dave Loebsack, who was re-elected with 54.8% of the vote in 2018. On April 12, 2019, he announced that he would not seek re-election.

### Democratic primary
#### Candidates
##### Nominee

* Rita Hart, former state senator and nominee for Lieutenant Governor of Iowa in 2018

##### Withdrawn

* Newman Abuissa, engineer

##### Declined

* Ken Croken, member of the Scott County Board of Supervisors
* Cathy Glasson, union leader, nurse, and candidate for Governor of Iowa in 2018
* Kevin Kinney, state senator
* Dave Loebsack, incumbent U.S. representative
* Ian Russell, attorney
* Veronica Tessler, businesswoman (endorsed Hart)
* Zach Wahls, state senator

#### Endorsements

Former US Executive Branch officials
* Barack Obama, former president of the United States (2009–2017, former Senator from Illinois (2005–2008)
Federal politicians
* Cindy Axne, U.S. representative (IA-3)
* Abby Finkenauer, U.S. representative (IA-1)
* Amy Klobuchar, U.S. senator from Minnesota
* Dave Loebsack, U.S. representative (IA-2)
Statewide politicians
* Patty Judge, former lieutenant governor of Iowa, former Iowa Secretary of Agriculture and nominee for U.S. Senate in 2016
* Rob Sand, Iowa State Auditor
State Senators
* Joe Bolkcom, state senator, District 43
* Chris Brase, former state senator, District 46
* Tom Courtney, former state senator, District 44
* Bob Dvorsky, former state senator, District 37
* Kevin Kinney, state senator, District 39
* Jim Lykam, state senator, District 45
* Rich Taylor, state senator, District 42
* Zach Wahls, state senator, District 37
State representatives
* Wes Breckenridge, state representative, District 29
* Mary Gaskill, state representative, District 81
* David Jacoby, state representative, District 74
* Monica Kurth, state representative, District 89
* Mary Mascher, state representative, District 86
* Phil Miller, former state representative, District 82
* Amy Nielsen, state representative, District 77
* Sally Stutsman, former state representative, District 77
* Phyllis Thede, state representative, District 93
* Mary Wolfe, state representative, District 98
* Frank Wood, former state representative, District 92, and former State Senator, District 42
Local politicians
* Ken Croken, Scott County Supervisor
* Cindy Drost, former Mahaska County Recorder
* Bill Gluba, former mayor of Davenport
* Thom Hart, former Mayor of Davenport
* Nasseem Hesler, former mayor of Keosauqua
* Rick Larkin, Lee County Supervisor
* Rick Lincoln, Clinton County Sheriff
* Janet Lyness, Johnson County Attorney
* Megan Suhr, Knoxville City Councillor
* Eric Van Lancker, Clinton County Auditor
Party officials
* Sue Dvorsky, former chair of the Iowa Democratic Party
Organizations
* Democratic Congressional Campaign Committee
* EMILY's List
* End Citizens United
* Giffords PAC
* Human Rights Campaign
* League of Conservation Voters Action Fund
* NARAL Pro-Choice America

#### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Rita Hart | 67,039 | 99.6 |
| | Write-in | Write-in | 271 | 0.4 |
| Total votes | Total votes | Total votes | 67,310 | 100.0 |

### Republican primary
#### Candidates
##### Nominee

* Mariannette Miller-Meeks, state senator; nominee for this seat in 2008, 2010, and 2014

##### Defeated in primary

* Tim Borchardt, retail worker
* Steven Everly, electrician
* Rick Phillips, businessman
* Bobby Schilling, former U.S. representative from Illinois's 17th congressional district (2011–2013)

##### Withdrawn

* Thomas Kedley, mayor of Osceola

##### Declined

* Chris Cournoyer, state senator
* Bob Gallagher, mayor of Bettendorf
* Bobby Kaufmann, state representative
* Barbara Kniff-McCulla, CEO of KLK Construction and member of the National Women's Business Council
* Mark Lofgren, state senator
* Chris Peters, surgeon and nominee for Iowa's 2nd congressional district in 2016 and 2018
* Brad Randolph, mayor of Fort Madison
* Roby Smith, state senator

#### Endorsements

Federal officials
* Joni Ernst, U.S. senator from Iowa
Statewide politicians
* Terry Branstad, former governor of Iowa
* Mike Naig, Iowa Secretary of Agriculture
* Kim Reynolds, Governor of Iowa
Organizations
* Maggie's List
Federal politicians
* Jim Jordan, U.S. representative

#### Results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Mariannette Miller-Meeks | 23,052 | 47.6 |
| | Republican | Bobby Schilling | 17,582 | 36.3 |
| | Republican | Steven Everly | 2,806 | 5.8 |
| | Republican | Rick Phillips | 2,444 | 5.1 |
| | Republican | Tim Borchardt | 2,370 | 4.9 |
| | Write-in | Write-in | 161 | 0.3 |
| Total votes | Total votes | Total votes | 48,415 | 100.0 |

### General election
#### Debate

2020 Iowa's 2nd congressional district debate :
| No. | Date | Host | Moderator | Link | Democratic | Republican |
| 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 | Rita Hart | Mariannette Miller-Meeks |
| 1 | Oct. 8, 2020 | The Gazette KCRG-TV KYOU-TV | Chris Earl James Lynch | | P | P |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Tossup | November 2, 2020 |
| Inside Elections | Lean D | October 28, 2020 |
| Sabato's Crystal Ball | Lean D | November 2, 2020 |
| Politico | Tossup | September 8, 2020 |
| Daily Kos | Lean D | September 25, 2020 |
| RCP | Tossup | October 13, 2020 |
| Niskanen | Likely D | July 26, 2020 |
| The Economist | Likely D | October 2, 2020 |

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Rita Hart (D) | Mariannette Miller-Meeks (R) | Other/ Undecided |
| Monmouth University | October 15–20, 2020 | 355 (RV) | ± 5.2% | 49% | 43% | 8% |
| Monmouth University | October 15–20, 2020 | 355 (LV) | ± 5.2% | 51% | 42% | – |
| Monmouth University | October 15–20, 2020 | 355 (LV) | ± 5.2% | 54% | 41% | – |
| Monmouth University | July 25 – August 3, 2020 | 374 (RV) | ± 5.1% | 47% | 44% | 9% |
| Monmouth University | July 25 – August 3, 2020 | 374 (LV) | ± 5.1% | 44% | 48% | 8% |
| Monmouth University | July 25 – August 3, 2020 | 374 (LV) | ± 5.1% | 45% | 48% | 7% |
| Harper Polling (R) | July 26–28, 2020 | 406 (LV) | ± 4.9% | 41% | 41% | 16% |
with Generic Democrat and Generic Republican
| Poll source | Date(s) administered | Sample size | Margin of error | Generic Democrat | Generic Republican | Other | Undecided |
| Selzer & Co./Des Moines Register | October 26–29, 2020 | – (LV) | ± 6.9% | 40% | 41% | 11% | 8% |
| Selzer and Co./Des Moines Register | September 14–17, 2020 | – (LV) | ± 8.7% | 50% | 46% | – | – |
| Selzer and Co./Des Moines Register | June 7–10, 2020 | – (LV) | <= ± 7.7% | 53% | 35% | – | – |
| Selzer and Co./Des Moines Register | March 2–5, 2020 | – (LV) | – | 41% | 49% | – | – |

#### Results

Iowa's 2nd congressional district, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Mariannette Miller-Meeks | 196,964 | 49.912 |
| | Democratic | Rita Hart | 196,958 | 49.910 |
| | Write-in | Write-in | 703 | 0.178 |
| Total votes | Total votes | Total votes | 394,625 | 100.0 |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |
Republican Mariannette Miller-Meeks was state-certified as the winner over Democrat Rita Hart on November 30 by an extremely narrow margin of 6 votes. On December 2, Hart announced that she would contest the election with the House Administration Committee under the 1969 Federal Contested Elections Act. On December 30, House Speaker Nancy Pelosi announced Miller-Meeks would be seated provisionally on January 3, 2021, with the rest of the incoming new Congress members. Republicans sharply criticized Pelosi's decision to review the race in the House Administration Committee, calling it an attempt to steal the election. It was also criticized by moderate Democrats, who argued it was hypocritical to overturn a certified state election after criticizing attempts to overturn the results of the 2020 presidential election. Hart withdrew her challenge on March 31, 2021. This was the closest House race in 2020 and one of the closest House races in a century.

## District 3

The 3rd district encompasses southwestern Iowa, stretching from Des Moines to the state's borders with Nebraska and Missouri. The incumbent was Democrat Cindy Axne, who flipped the district and was elected with 49.3% of the vote in 2018.

### Democratic primary
#### Candidates
##### Nominee

* Cindy Axne, incumbent U.S. Representative

#### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Cindy Axne (incumbent) | 76,681 | 99.2 |
| | Write-in | Write-in | 623 | 0.8 |
| Total votes | Total votes | Total votes | 77,304 | 100.0 |

### Republican primary
#### Candidates
##### Nominee

* David Young, former U.S. representative

##### Defeated in primary

* Bill Schafer, U.S. Army veteran

##### Declined

* Jon Jacobsen, state representative
* Zach Nunn, state senator
* Brad Zaun, state senator

#### Results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | David Young | 39,103 | 69.5 |
| | Republican | Bill Schafer | 16,904 | 30.1 |
| | Write-in | Write-in | 227 | 0.4 |
| Total votes | Total votes | Total votes | 56,234 | 100.0 |

### Third parties
#### Candidates

* Bryan Jack Holder (Libertarian)

### General election
#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Lean D | November 2, 2020 |
| Inside Elections | Lean D | October 28, 2020 |
| Sabato's Crystal Ball | Lean D | November 2, 2020 |
| Politico | Lean D | November 2, 2020 |
| Daily Kos | Lean D | October 15, 2020 |
| RCP | Tossup | October 13, 2020 |
| Niskanen | Lean D | July 26, 2020 |
| The Economist | Lean D | October 2, 2020 |

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Cindy Axne (D) | David Young (R) | Bryan Holder (L) | Other/ Undecided |
| Monmouth University | October 15–20, 2020 | 426 (RV) | ± 4.8% | 52% | 43% | – | 2% |
| Monmouth University | October 15–20, 2020 | 426 (LV) | ± 4.8% | 53% | 42% | – | – |
| Monmouth University | October 15–20, 2020 | 426 (LV) | ± 4.8% | 55% | 41% | – | – |
| Monmouth University | July 25 – August 3, 2020 | 507 (RV) | ± 4.4% | 48% | 42% | 2% | 8% |
| Monmouth University | July 25 – August 3, 2020 | 507 (LV) | ± 4.4% | 50% | 42% | – | 8% |
| Monmouth University | July 25 – August 3, 2020 | 507 (LV) | ± 4.4% | 52% | 41% | – | 7% |
| The Tarrance Group (R) | July 7–9, 2020 | 400 (LV) | ± 4.9% | 43% | 44% | 6% | 7% |
| The Tarrance Group (R) | March 10–12, 2020 | 400 (LV) | ± 4.9% | 48% | 48% | – | 5% |
with Generic Democrat and Generic Republican
| Poll source | Date(s) administered | Sample size | Margin of error | Generic Democrat | Generic Republican | Other | Undecided |
| Selzer & Co./Des Moines Register | October 26–29, 2020 | – (LV) | ± 6.6% | 45% | 39% | 8% | 9% |
| Selzer and Co./Des Moines Register | September 14–17, 2020 | – (LV) | ± 7.7% | 48% | 42% | – | – |
| Selzer and Co./Des Moines Register | June 7–10, 2020 | – (LV) | <= ± 7.7% | 52% | 36% | – | – |
| Selzer and Co./Des Moines Register | March 2–5, 2020 | – (LV) | – | 42% | 43% | – | – |

#### Results

Iowa's 3rd congressional district, 2020 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Cindy Axne (incumbent) | 219,205 | 48.9 |
| | Republican | David Young | 212,997 | 47.6 |
| | Libertarian | Bryan Jack Holder | 15,361 | 3.4 |
| | Write-in | Write-in | 384 | 0.1 |
| Total votes | Total votes | Total votes | 447,947 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

## District 4

The 4th district is based in northwestern Iowa, including Sioux City, Ames, Mason City, Fort Dodge, Boone and Carroll. The incumbent was Republican Steve King, who had been re-elected with 50.3% of the vote in 2018.

### Republican primary
#### Candidates
##### Nominee

* Randy Feenstra, state senator

##### Defeated in primary

* Steve King, incumbent U.S. representative
* Steve Reeder, businessman
* Bret Richards, U.S. Army veteran and former businessman
* Jeremy Taylor, Woodbury County supervisor and former state representative

##### Declined

* Rick Bertrand, state senator and candidate for Iowa's 4th congressional district in 2016
* Cyndi Hanson, candidate for Iowa's 4th congressional district in 2018
* Chris McGowan, president of the Siouxland Chamber of Commerce
* Rick Sanders, Story County supervisor
* Linda Upmeyer, Speaker of the Iowa House of Representatives

#### Endorsements

State senators
* Annette Sweeney, state senator, District 25
State representatives
* Dan Huseman, state representative, District 3
* Megan Jones, state representative, District 2
* Tim Kraayenbrink, state representative, District 5
Individuals
* Ben Shapiro, conservative commentator and host of The Daily Wire
* Bob Vander Plaats, president and CEO of The Family Leader, candidate for Governor of Iowa in 2002, 2006 and 2010 and nominee for Lieutenant Governor of Iowa in 2006
Organizations
* Republican Jewish Coalition
* Republican Main Street Partnership PAC
* U.S. Chamber of Commerce
Newspapers
* Sioux City Journal
State representatives
* Ralph Klemme, former state representative (District 3)
Individuals
* Sam Clovis, national co-chair of Donald Trump's 2016 presidential campaign, candidate for State Treasurer of Iowa in 2014

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Steve King | Randy Feenstra | Steve Reeder | Jeremy Taylor | Other | Undecided |
| Public Opinion Strategies (R) | May 16–18, 2020 | 400 (V) | ± 4.9% | 39% | 41% | 1% | 4% | 3% | – |
| Public Opinion Strategies (R) | May 16–18, 2020 | 400 (V) | ± 4.9% | 41% | 48% | – | – | – | – |
| American Viewpoint | May 7–8, 2020 | 350 (LV) | ± 5.2% | 39% | 36% | – | – | 9% | 10% |
| American Viewpoint | April 27–29, 2020 | 400 (LV) | ± 4.9% | 41% | 34% | – | – | 8% | 15% |
| American Viewpoint | January 27–29, 2020 | – (V) | – | 53% | 22% | – | – | – | – |
| G1 Survey Research | October 1–3, 2019 | 400 (LV) | ± 4.89% | 59% | 15% | 6% | 0% | 2% | 17% |
| G1 Survey Research | October 1–3, 2019 | 400 (LV) | ± 4.89% | 64% | 24% | – | – | – | 12% |
| G1 Survey Research | October 1–3, 2019 | 400 (LV) | ± 4.89% | 64% | – | – | 19% | – | 17% |

#### Results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Randy Feenstra | 37,329 | 45.5 |
| | Republican | Steve King (incumbent) | 29,366 | 35.9 |
| | Republican | Jeremy Taylor | 6,418 | 7.8 |
| | Republican | Bret Richards | 6,140 | 7.5 |
| | Republican | Steve Reeder | 2,528 | 3.1 |
| | Write-in | Write-in | 176 | 0.2 |
| Total votes | Total votes | Total votes | 81,957 | 100.0 |

### Democratic primary
#### Candidates
##### Nominee

* J. D. Scholten, former paralegal, former professional baseball player, and nominee for Iowa's 4th congressional district in 2018

#### Endorsements

Organizations
* League of Conservation Voters Action Fund
* Sierra Club

#### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | J. D. Scholten | 46,370 | 99.6 |
| | Write-in | Write-in | 166 | 0.4 |
| Total votes | Total votes | Total votes | 46,536 | 100.0 |

### General election
#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Safe R | November 2, 2020 |
| Inside Elections | Safe R | October 16, 2020 |
| Sabato's Crystal Ball | Safe R | October 15, 2020 |
| Politico | Likely R | November 2, 2020 |
| Daily Kos | Safe R | October 15, 2020 |
| RCP | Lean R | October 13, 2020 |
| Niskanen | Likely R | July 26, 2020 |
| The Economist | Likely R | October 2, 2020 |

#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Randy Feenstra (R) | J.D. Scholten (D) | Other/ Undecided |
| Monmouth University | October 15–20, 2020 | 414 (RV) | ± 4.8% | 48% | 42% | 10% |
| Monmouth University | October 15–20, 2020 | 414 (LV) | ± 4.8% | 48% | 43% | – |
| Monmouth University | October 15–20, 2020 | 414 (LV) | ± 4.8% | 47% | 44% | – |
| Change Research (D) | October 13–15, 2020 | 603 (LV) | ± 4% | 50% | 45% | – |
| American Viewpoint (R) | October 6–8, 2020 | 400 (LV) | ± 5.0% | 54% | 31% | 11% |
| Monmouth University | July 25 – August 3, 2020 | 374 (RV) | ± 5.1% | 54% | 34% | 12% |
| Monmouth University | July 25 – August 3, 2020 | 374 (LV) | ± 5.1% | 55% | 34% | 10% |
| Monmouth University | July 25 – August 3, 2020 | 374 (LV) | ± 5.1% | 56% | 33% | 10% |
with Steve King and J.D. Scholten
| Poll source | Date(s) administered | Sample size | Margin of error | Steve King (R) | J.D. Scholten (D) | Undecided |
| 20 Insight (D) | January 16–17, 2019 | 472 (LV) | ± 4.5% | 39% | 44% | 17% |
with Steve King and Generic Democrat
| Poll source | Date(s) administered | Sample size | Margin of error | Steve King (R) | Generic Democrat | Undecided |
| 20/20 Insight (D) | January 16–17, 2019 | 472 (LV) | ± 4.5% | 37% | 45% | 18% |
with Generic Republican and Generic Democrat
| Poll source | Date(s) administered | Sample size | Margin of error | Generic Republican | Generic Democrat | Other | Undecided |
| Selzer & Co./Des Moines Register | October 26–29, 2020 | – (LV) | ± 6.9% | 50% | 33% | 10% | 8% |
| Selzer and Co./Des Moines Register | September 14–17, 2020 | – (LV) | ± 7.5% | 49% | 44% | – | – |
| Selzer and Co./Des Moines Register | June 7–10, 2020 | – (LV) | <= ± 7.7% | 57% | 35% | – | – |
| Selzer and Co./Des Moines Register | March 2–5, 2020 | – (LV) | – | 51% | 40% | – | – |

#### Results

Iowa's 4th congressional district, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Randy Feenstra | 237,369 | 62.0 |
| | Democratic | J. D. Scholten | 144,761 | 37.8 |
| | Write-in | Write-in | 892 | 0.2 |
| Total votes | Total votes | Total votes | 383,022 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |