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 2025, this is the only time since 2010 that Democrats won any house race in Oklahoma.
Results summary
Statewide
District Results of the 2018 United States House of Representatives elections in Oklahoma by district:
DistrictRepublicanDemocraticOthersTotalResult Votes % Votes % Votes % Votes %District 1 150,129 59.30% 103,042 40.70% 0 0.00% 253,171 100.00% Republican holdDistrict 2 140,451 65.02% 65,021 30.10% 10,530 4.87% 216,002 100.00% Republican holdDistrict 3 172,913 73.87% 61,152 26.13% 0 0.00% 234,065 100.00% Republican holdDistrict 4 149,227 63.06% 78,088 33.00% 9,323 3.94% 236,638 100.00% Republican holdDistrict 5 117,811 49.30% 121,149 50.70% 0 0.00% 238,960 100.00% Democratic gainTotal 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
Results
Runoff Polling Poll source Date(s)administered Samplesize Marginof error TimHarris KevinHern UndecidedSoonerPollSoonerPoll July 24–29, 2018 811 ± 3.4% 38% 26% 36%
Results
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
Runoff results
General election Polling Poll source Date(s)administered Samplesize Marginof error KevinHern (R) TimGilpin (D) UndecidedSoonerPollSoonerPoll September 15–25, 2018 306 ± 5.6% 54% 32% 14%
Predictions SourceRankingAs of The Cook Political ReportNovember 5, 2018 Inside ElectionsNovember 5, 2018 Sabato's Crystal BallNovember 5, 2018RCPNovember 5, 2018Daily KosNovember 5, 2018538November 7, 2018CNNOctober 31, 2018PoliticoNovember 2, 2018
Results
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
Results
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
Runoff results
General election Polling Poll source Date(s)administered Samplesize Marginof error MarkwayneMullin (R) JasonNichols (D) RichardCastaldo (L) JohnForeman (I) UndecidedSoonerPollSoonerPoll September 15–25, 2018 306 ± 5.6% 46% 32% 4% 6% 12%
Predictions SourceRankingAs of The Cook Political ReportNovember 5, 2018 Inside ElectionsNovember 5, 2018 Sabato's Crystal BallNovember 5, 2018RCPNovember 5, 2018Daily KosNovember 5, 2018538November 7, 2018CNNOctober 31, 2018PoliticoNovember 2, 2018
Results
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
General election Polling Poll source Date(s)administered Samplesize Marginof error FrankLucas (R) FrankieRobbins (D) UndecidedSoonerPollSoonerPoll September 15–25, 2018 267 ± 6.0% 54% 24% 22%
Predictions SourceRankingAs of The Cook Political ReportNovember 5, 2018 Inside ElectionsNovember 5, 2018 Sabato's Crystal BallNovember 5, 2018RCPNovember 5, 2018Daily KosNovember 5, 2018538November 7, 2018CNNOctober 31, 2018PoliticoNovember 2, 2018
Results
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 2016. The district had a PVI of R+20.
Republican primary Candidates Nominee Tom Cole, incumbent U.S. representative
Eliminated in primary James Taylor
Results
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
Runoff results
General election Polling Poll source Date(s)administered Samplesize Marginof error TomCole (R) MaryBrannon (D) RudyPeters (I) UndecidedSoonerPoll September 15–25, 2018 291 ± 5.74% 58% 25% 6% 11%
Predictions SourceRankingAs of The Cook Political ReportNovember 5, 2018 Inside ElectionsNovember 5, 2018 Sabato's Crystal BallNovember 5, 2018RCPNovember 5, 2018Daily KosNovember 5, 2018538November 7, 2018CNNOctober 31, 2018PoliticoNovember 2, 2018
Results
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
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 2012 and candidate for this seat in 2010, 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
Runoff results
General election Polling Poll source Date(s)administered Samplesize Margin oferror SteveRussell (R) KendraHorn (D) UndecidedSoonerPollSoonerPoll October 29, 2018 440 ± 4.66% 49% 37% 14%VCreek/AMG (R-Russell)VCreek/AMG (R-Russell) October 14–15, 2018 974 ± 3.14% 51% 35% 14%VCreek/AMG (R-Russell)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)VCreek/AMG (R-Russell) September 4–6, 2018 1,182 ± 2.85% 49% 35% 16%
Predictions SourceRankingAs of The Cook Political ReportNovember 5, 2018 Inside ElectionsNovember 5, 2018 Sabato's Crystal BallNovember 5, 2018RCPNovember 5, 2018Daily KosNovember 5, 2018538November 7, 2018CNNOctober 31, 2018PoliticoNovember 2, 2018
Results
References
External links Candidates at Vote Smart Candidates at Ballotpedia Campaign finance at FEC Campaign finance at OpenSecrets
Official campaign websites for first district candidates Tim Gilpin (D) for Congress Kevin Hern (R) for Congress
Official campaign websites for second district candidates Markwayne Mullin (R) for Congress Jason Nichols (D) for Congress
Official campaign websites for third district candidates Frank Lucas (R) for Congress Frankie Robbins (D) for Congress
Official campaign websites for fourth district candidates Mary Brannon (D) for Congress Tom Cole (R) for Congress
Official campaign websites for fifth district candidates Steve Russell (R) for Congress Kendra Horn (D) for Congress