# 2018 United States House of Representatives elections in Oklahoma

The 2018 United States House of Representatives elections in Oklahoma were held on November 6, 2018, to elect the five U.S. representatives from the state of Oklahoma, one from each of the state's five congressional districts. The elections coincided with other elections to the House of Representatives, elections to the United States Senate and various state and local elections. Primary elections were held on June 26 and runoff elections were held two months later on August 28. The state's U.S. House delegation Republican majority changed from 5–0 to 4–1. As of 2023, this is the only time since 2010 that Democrats won any house race in Oklahoma.

## Results summary

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vte :

### Statewide

Popular vote
Republican
61.97%
Democratic
36.35%
Independent
1.33%
Libertarian
0.35% :
House seats
Republican
80.00%
Democratic
20.00% :

### District

Results of the 2018 United States House of Representatives elections in Oklahoma by district:
| District | Republican | Republican | Democratic | Democratic | Others | Others | Total | Total | Result |
| District | Votes | % | Votes | % | Votes | % | Votes | % | Result |
| District 1 | 150,129 | 59.30% | 103,042 | 40.70% | 0 | 0.00% | 253,171 | 100.00% | Republican hold |
| District 2 | 140,451 | 65.02% | 65,021 | 30.10% | 10,530 | 4.87% | 216,002 | 100.00% | Republican hold |
| District 3 | 172,913 | 73.87% | 61,152 | 26.13% | 0 | 0.00% | 234,065 | 100.00% | Republican hold |
| District 4 | 149,227 | 63.06% | 78,088 | 33.00% | 9,323 | 3.94% | 236,638 | 100.00% | Republican hold |
| District 5 | 117,811 | 49.30% | 121,149 | 50.70% | 0 | 0.00% | 238,960 | 100.00% | Democratic gain |
| Total | 730,531 | 61.97% | 428,452 | 36.35% | 19,853 | 1.68% | 1,178,836 | 100.00% | |

## District 1

The 1st district is located in the Tulsa metropolitan area and includes Creek, Rogers, Tulsa, Wagoner and Washington counties. Incumbent Republican Jim Bridenstine, who had represented the district since 2013, resigned on April 23 to become NASA Administrator. He was re-elected unopposed in 2016. The district had a PVI of R+17.

### Republican primary

During his initial election in 2012, Bridenstine self-imposed a three term limit. Bridenstine confirmed that he would honor his term-limit pledge.
Bridenstine became Administrator of NASA in the Donald Trump administration, and resigned on April 23.

#### Candidates
##### Nominee

* Kevin Hern, businessman

##### Eliminated in primary

* Andy Coleman, veteran
* Nathan Dahm, state senator
* Tim Harris, former Tulsa County District Attorney
* Danny Stockstill

##### Declined

* Dewey F. Bartlett Jr., former mayor of Tulsa
* John D. Doak, Oklahoma Insurance Commissioner
* Dan Newberry, state senator
* Everett Piper, Oklahoma Wesleyan University president
* Scott Pruitt, Administrator of the Environmental Protection Agency, former State Attorney General and candidate for this seat in 2002
* T.W. Shannon, former Speaker of the Oklahoma House of Representatives

#### Endorsements
##### Organizations

* Club for Growth
* With Honor Fund

##### Organizations

* FreedomWorks
* NRA Political Victory Fund
* Republican Liberty Caucus

##### Organizations

* Republican Main Street Partnership

#### Results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Tim Harris | 28,392 | 27.5 |
| | Republican | Kevin Hern | 23,425 | 22.7 |
| | Republican | Andy Coleman | 22,584 | 21.9 |
| | Republican | Nathan Dahm | 20,843 | 20.2 |
| | Republican | Danny Stockstill | 8,086 | 7.8 |
| Total votes | Total votes | Total votes | 103,330 | 100.0 |

#### Runoff
##### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Tim Harris | Kevin Hern | Undecided |
| SoonerPoll | July 24–29, 2018 | 811 | ± 3.4% | 38% | 26% | 36% |

##### Results

Republican primary runoff results :
| Party | Party | Candidate | Votes | % |
| | Republican | Kevin Hern | 40,373 | 54.9 |
| | Republican | Tim Harris | 33,138 | 45.1 |
| Total votes | Total votes | Total votes | 73,511 | 100.0 |

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

* Tim Gilpin, attorney, and former Oklahoma State Board of Education member

##### Eliminated in primary

* Amanda Douglas, business analyst, energy consultant and member of the Cherokee Nation
* Gwendolyn Fields
* Mark Keeter
* David Hullum

##### Declined

* Kathy Taylor, former mayor of Tulsa

#### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Tim Gilpin | 24,532 | 34.5 |
| | Democratic | Amanda Douglas | 23,045 | 32.4 |
| | Democratic | Gwendolyn Fields | 13,947 | 19.6 |
| | Democratic | Mark Keeter | 6,013 | 8.5 |
| | Democratic | David Hullum | 3,573 | 5.0 |
| Total votes | Total votes | Total votes | 71,110 | 100.0 |

#### Runoff results

Democratic primary runoff results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Tim Gilpin | 16,985 | 59.4 |
| | Democratic | Amanda Douglas | 11,620 | 40.6 |
| Total votes | Total votes | Total votes | 28,605 | 100.0 |

### General election
#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Kevin Hern (R) | Tim Gilpin (D) | Undecided |
| SoonerPoll | September 15–25, 2018 | 306 | ± 5.6% | 54% | 32% | 14% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Safe R | November 5, 2018 |
| Inside Elections | Safe R | November 5, 2018 |
| Sabato's Crystal Ball | Safe R | November 5, 2018 |
| RCP | Safe R | November 5, 2018 |
| Daily Kos | Safe R | November 5, 2018 |
| 538 | Safe R | November 7, 2018 |
| CNN | Safe R | October 31, 2018 |
| Politico | Safe R | November 2, 2018 |

#### Results

Oklahoma's 1st congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Republican | Kevin Hern | 150,129 | 59.3 |
| | Democratic | Tim Gilpin | 103,042 | 40.7 |
| Total votes | Total votes | Total votes | 253,171 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 2

The 2nd district is located in the regions of Green Country and Kiamichi Country and includes the city of Muskogee and numerous sparsely populated counties. The incumbent was Republican Markwayne Mullin, who had represented the district since 2013. He was re-elected with 71% of the vote in 2016.

### Republican primary

Mullin had pledged to serve only three terms when he was first elected in 2012. During the 2016 campaign, Mullin stated he was reassessing his pledge, and refused to rule out running again in 2018.

#### Candidates
##### Nominee

* Markwayne Mullin, incumbent U.S. representative

##### Eliminated in primary

* Brian Jackson
* Jarrin Jackson, veteran, conservative activist and candidate for the seat in 2016
* John McCarthy

##### Declined

* Josh Brecheen, state senator
* George Faught, state representative
* Todd Hiett, Oklahoma Corporation Commissioner
* Charles McCall, state representative

#### Endorsements
##### U.S. senators

* Tom Coburn, former U.S. senator (R-OK)

#### Results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Markwayne Mullin (incumbent) | 32,624 | 54.1 |
| | Republican | Jarrin Jackson | 15,191 | 25.2 |
| | Republican | Brian Jackson | 6,899 | 11.5 |
| | Republican | John McCarthy | 5,536 | 9.2 |
| Total votes | Total votes | Total votes | 60,250 | 100.0 |

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

* Jason Nichols, mayor of Tahlequah

##### Eliminated in primary

* Elijah McIntosh
* Clay Padgett, retired Army lieutenant colonel and public educator

##### Declined

* Bill John Baker, Principal Chief of the Cherokee Nation
* Sean Burrage, Southeastern Oklahoma State University president
* Kalyn Free, former district attorney for Haskell & Pittsburg counties and candidate for this seat in 2004

#### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jason Nichols | 32,549 | 37.9 |
| | Democratic | Clay Padgett | 20,796 | 24.2 |
| | Democratic | Elijah McIntosh | 16,343 | 19.0 |
| | Democratic | Virginia Jenner | 16,204 | 18.9 |
| Total votes | Total votes | Total votes | 85,892 | 100.0 |

#### Runoff results

Democratic primary runoff results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Jason Nichols | 19,548 | 56.8 |
| | Democratic | Clay Padgett | 14,845 | 43.2 |
| Total votes | Total votes | Total votes | 34,393 | 100.0 |

### General election
#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Markwayne Mullin (R) | Jason Nichols (D) | Richard Castaldo (L) | John Foreman (I) | Undecided |
| SoonerPoll | September 15–25, 2018 | 306 | ± 5.6% | 46% | 32% | 4% | 6% | 12% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Safe R | November 5, 2018 |
| Inside Elections | Safe R | November 5, 2018 |
| Sabato's Crystal Ball | Safe R | November 5, 2018 |
| RCP | Safe R | November 5, 2018 |
| Daily Kos | Safe R | November 5, 2018 |
| 538 | Safe R | November 7, 2018 |
| CNN | Safe R | October 31, 2018 |
| Politico | Safe R | November 2, 2018 |

#### Results

Oklahoma's 2nd congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Republican | Markwayne Mullin (incumbent) | 140,451 | 65.0 |
| | Democratic | Jason Nichols | 65,021 | 30.1 |
| | Independent | John Foreman | 6,390 | 3.0 |
| | Libertarian | Richard Castaldo | 4,140 | 1.9 |
| Total votes | Total votes | Total votes | 216,002 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 3

The 3rd district is located in Western Oklahoma. The largest district in Oklahoma and one of the largest in the country, it includes the Oklahoma Panhandle, Ponca City and the city of Stillwater as well as the Osage Nation. Incumbent Republican Frank Lucas, who had represented the district since 2003 and previously represented the 6th district from 1994 to 2003, ran for re-election. He was re-elected with 78% of the vote in 2016. The district had a PVI of R+27.

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

* Frank Lucas, incumbent U.S. representative

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

* Frankie Robbins, engineer

##### Eliminated in primary

* Murray Thibodeaux

#### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Frankie Robbins | 38,733 | 64.8 |
| | Democratic | Murray Thibodeaux | 20,998 | 35.2 |
| Total votes | Total votes | Total votes | 59,731 | 100.0 |

### General election
#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Frank Lucas (R) | Frankie Robbins (D) | Undecided |
| SoonerPoll | September 15–25, 2018 | 267 | ± 6.0% | 54% | 24% | 22% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Safe R | November 5, 2018 |
| Inside Elections | Safe R | November 5, 2018 |
| Sabato's Crystal Ball | Safe R | November 5, 2018 |
| RCP | Safe R | November 5, 2018 |
| Daily Kos | Safe R | November 5, 2018 |
| 538 | Safe R | November 7, 2018 |
| CNN | Safe R | October 31, 2018 |
| Politico | Safe R | November 2, 2018 |

#### Results

Oklahoma's 3rd congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Republican | Frank Lucas (incumbent) | 172,913 | 73.9 |
| | Democratic | Frankie Robbins | 61,152 | 26.1 |
| Total votes | Total votes | Total votes | 234,065 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 4

The 4th district is located in South Central Oklahoma and includes the suburbs of Oklahoma City, such as the counties of Canadian, Comanche and Cleveland and numerous other sparsely populated counties. Incumbent Republican Tom Cole, who had represented the district since 2003, ran for re-election. He was re-elected with 70% of the vote in 20. The district had a PVI of R+20.

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

* Tom Cole, incumbent U.S. representative

##### Eliminated in primary

* James Taylor

#### Results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Tom Cole (incumbent) | 55,891 | 64.7 |
| | Republican | James Taylor | 30,441 | 35.3 |
| Total votes | Total votes | Total votes | 86,332 | 100.0 |

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

* Mary Brannon, teacher

##### Eliminated in primary

* Fred Gipson, former Chief Counsel to the University of Oklahoma
* Roxann Klutts
* Mallory Varner

##### Withdrawn

* John McKenna

#### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mary Brannon | 25,736 | 34.4 |
| | Democratic | Fred Gipson | 22,744 | 30.4 |
| | Democratic | Mallory Varner | 13,938 | 18.6 |
| | Democratic | Roxann Klutts | 12,482 | 16.7 |
| Total votes | Total votes | Total votes | 74,900 | 100.0 |

#### Runoff results

Democratic primary runoff results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mary Brannon | 15,245 | 57.5 |
| | Democratic | Fred Gipson | 11,264 | 42.5 |
| Total votes | Total votes | Total votes | 26,509 | 100.0 |

### General election
#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Tom Cole (R) | Mary Brannon (D) | Rudy Peters (I) | Undecided |
| SoonerPoll | September 15–25, 2018 | 291 | ± 5.74% | 58% | 25% | 6% | 11% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Safe R | November 5, 2018 |
| Inside Elections | Safe R | November 5, 2018 |
| Sabato's Crystal Ball | Safe R | November 5, 2018 |
| RCP | Safe R | November 5, 2018 |
| Daily Kos | Safe R | November 5, 2018 |
| 538 | Safe R | November 7, 2018 |
| CNN | Safe R | October 31, 2018 |
| Politico | Safe R | November 2, 2018 |

#### Results

Oklahoma's 4th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Republican | Tom Cole (incumbent) | 149,227 | 63.1 |
| | Democratic | Mary Brannon | 78,088 | 33.0 |
| | Independent | Ruby Peters | 9,323 | 3.9 |
| Total votes | Total votes | Total votes | 236,638 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

## District 5

The 5th district is located in Central Oklahoma and centered around the state capital, Oklahoma City, and the surrounding areas such as Edmond and Shawnee. Incumbent Republican Steve Russell, who had represented the district since 2015, ran for re-election. He was re-elected with 57% of the vote in 2016. The district had a PVI of R+10. Democrat Kendra Horn won by a margin of 1.4% in what was considered an upset.

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

* Steve Russell, incumbent U.S. representative

##### Eliminated in primary

* Gregory Dunson
* DeJuan Edwards

#### Results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Steve Russell (incumbent) | 65,982 | 83.6 |
| | Republican | Gregory Dunson | 7,638 | 9.7 |
| | Republican | DeJuan Edwards | 5,284 | 6.7 |
| Total votes | Total votes | Total votes | 78,904 | 100.0 |

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

* Kendra Horn, attorney and communication technology firm strategic consultant

##### Eliminated in primary

* Elysabeth Britt, human resources professional
* Tom Guild, former tenured professor at the University of Central Oklahoma, nominee for the seat in 2010 & 2012 and candidate for this seat in 2014 & 2016
* Leona Kelley-Leonard, chair of the Seminole County Democratic Party and candidate for this seat in 2014 & 2016
* Tyson Meade, singer and songwriter
* Eddie Porter, retired state planner for the Oklahoma Department of Human Services

##### Declined

* Al McAffrey, state senator and nominee for this seat in 2014 & 2016

#### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Kendra Horn | 34,857 | 43.8 |
| | Democratic | Tom Guild | 14,242 | 17.9 |
| | Democratic | Elysabeth Britt | 10,739 | 13.5 |
| | Democratic | Eddie Porter | 8,447 | 10.6 |
| | Democratic | Leona Kelley-Leonard | 6,693 | 8.4 |
| | Democratic | Tyson Meade | 4,527 | 5.7 |
| Total votes | Total votes | Total votes | 79,505 | 100.0 |

#### Runoff results

Democratic primary runoff results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Kendra Horn | 22,052 | 75.8 |
| | Democratic | Tom Guild | 7,039 | 24.2 |
| Total votes | Total votes | Total votes | 29,091 | 100.0 |

### General election
#### Polling

| Poll source | Date(s) administered | Sample size | Margin of error | Steve Russell (R) | Kendra Horn (D) | Undecided |
| SoonerPoll | October 29, 2018 | 440 | ± 4.66% | 49% | 37% | 14% |
| VCreek/AMG (R-Russell) | October 14–15, 2018 | 974 | ± 3.14% | 51% | 35% | 14% |
| VCreek/AMG (R-Russell) | September 24–25, 2018 | 1,407 | ± 2.61% | 50% | 37% | 13% |
| SoonerPoll | September 15–25, 2018 | 303 | ± 5.63% | 47% | 37% | 16% |
| VCreek/AMG (R-Russell) | September 4–6, 2018 | 1,182 | ± 2.85% | 49% | 35% | 16% |

#### Predictions

| Source | Ranking | As of |
| The Cook Political Report | Likely R | November 5, 2018 |
| Inside Elections | Safe R | November 5, 2018 |
| Sabato's Crystal Ball | Likely R | November 5, 2018 |
| RCP | Likely R | November 5, 2018 |
| Daily Kos | Likely R | November 5, 2018 |
| 538 | Likely R | November 7, 2018 |
| CNN | Safe R | October 31, 2018 |
| Politico | Likely R | November 2, 2018 |

#### Results

Oklahoma's 5th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Kendra Horn | 121,149 | 50.70 |
| | Republican | Steve Russell (incumbent) | 117,811 | 49.30 |
| Total votes | Total votes | Total votes | 238,960 | 100.00 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |