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Elections to the U.S. House will be held on November 6, 2018. All 435 seats will be up for election. Special elections were held earlier in 2018 and in 2017 to fill vacancies that occurred in the 115th Congress.

As of October 2018, the Republican Party was in the majority, holding 235 seats to Democrats' 193 seats, with seven seats being vacant. Democrats need to have a net gain of 23 Republican seats to win the House. Click here to see the 2018 battleground House races identified by Ballotpedia.

The Democratic Party is well-positioned to gain seats, according to a 100-year historical analysis of House elections conducted by Ballotpedia and political scientist Jacob Smith. From 1918 to 2016, the president’s party lost an average of 29 seats in midterm elections. In the 20 percent of elections where the president lost the most seats—which Ballotpedia defined as wave elections—his party lost at least 48 seats.

Fifty-six U.S. representatives did not seek re-election, either retiring or seeking higher office. Click here to see a full list of departing incumbents.

Thirty-eight seats up in 2018 were won by the presidential candidate of the opposite party in 2016: Hillary Clinton (D) won 25 Republican-held districts and Donald Trump (R) won 13 Democratic-held districts. Read more below.

Ballotpedia covered every state and federal primary in 2018 to highlight the intraparty conflicts that shaped the parties and the general elections. Click here for our coverage of Republican Party primaries in 2018, and here for our coverage of Democratic Party primaries.

Partisan breakdown

Following the 2016 general election, the Democratic Party gained six seats. They picked up seven seats while losing one in Nebraska. The Democratic Party fell short of the 30 seats required to retake the chamber. After flipping a Republican seat in Pennsylvania in a February 2018 special election, the Democratic Party would need to pick up 23 seats in 2018 to win the chamber.[1]


Democratic Party




Republican Party











See also: U.S. House battlegrounds, 2018

This is a list of the U.S. House battlegrounds in 2018.

United States House Battleground Races




Alaska's at-large

Republican PartyDon Young


Arkansas' 2nd

Republican PartyFrench Hill


Arizona's 1st

Democratic PartyTom O'Halleran


Arizona's 2nd

Republican PartyMartha McSally


California's 8th

Republican PartyPaul Cook


California's 10th

Republican PartyJeff Denham


California's 16th

Democratic PartyJim Costa


California's 22nd

Republican PartyDevin Nunes


California's 25th

Republican PartyStephen Knight


California's 39th

Republican PartyEdward Royce


California's 45th

Republican PartyMimi Walters


California's 48th

Republican PartyDana Rohrabacher


California's 49th

Republican PartyDarrell Issa


California's 50th

Republican PartyDuncan Hunter


Colorado's 6th

Republican PartyMike Coffman


Florida's 15th

Republican PartyDennis Ross


Florida's 16th

Republican PartyVern Buchanan


Florida's 18th

Republican PartyBrian Mast


Florida's 25th

Republican PartyMario Diaz-Balart


Florida's 26th

Republican PartyCarlos Curbelo


Florida's 27th

Republican PartyIleana Ros-Lehtinen


Georgia's 6th

Republican PartyKaren Handel


Georgia's 7th

Republican PartyRob Woodall


Illinois' 6th

Republican PartyPeter Roskam


Illinois' 12th

Republican PartyMike Bost


Illinois' 13th

Republican PartyRodney Davis


Illinois' 14th

Republican PartyRandy Hultgren


Iowa's 1st

Republican PartyRod Blum


Iowa's 3rd

Republican PartyDavid Young


Kansas' 2nd

Republican PartyLynn Jenkins


Kansas' 3rd

Republican PartyKevin Yoder


Kentucky's 6th

Republican PartyAndy Barr


Maine's 2nd

Republican PartyBruce Poliquin


Michigan's 8th

Republican PartyMike Bishop


Michigan's 11th

Republican PartyDavid Trott


Minnesota's 1st

Democratic PartyTim Walz


Minnesota's 2nd

Republican PartyJason Lewis


Minnesota's 3rd

Republican PartyErik Paulsen


Minnesota's 8th

Democratic PartyRick Nolan


Montana's at-large

Republican PartyGreg Gianforte


Nebraska's 2nd

Republican PartyDon Bacon


Nevada's 3rd

Democratic PartyJacky Rosen


Nevada's 4th

Democratic PartyRuben Kihuen


New Hampshire's 1st

Democratic PartyCarol Shea-Porter


New Jersey's 2nd

Republican PartyFrank LoBiondo


New Jersey's 3rd

Republican PartyTom MacArthur


New Jersey's 7th

Republican PartyLeonard Lance


New Jersey's 11th

Republican PartyRodney Frelinghuysen


New Mexico's 2nd

Republican PartySteve Pearce


New York's 11th

Republican PartyDan Donovan


New York's 19th

Republican PartyJohn Faso


New York's 22nd

Republican PartyClaudia Tenney


New York's 27th

Republican PartyChris Collins


North Carolina's 2nd

Republican PartyGeorge Holding


North Carolina's 9th

Republican PartyRobert Pittenger


North Carolina's 13th

Republican PartyTed Budd


Ohio's 1st

Republican PartySteve Chabot


Ohio's 7th

Republican PartyBob Gibbs


Ohio's 12th

Republican PartyTroy Balderson


Pennsylvania's 1st

Republican PartyBrian Fitzpatrick


Pennsylvania's 5th

Republican PartyVacant


Pennsylvania's 6th

Republican PartyRyan Costello


Pennsylvania's 7th

Republican PartyVacant


Pennsylvania's 14th

Democratic PartyConor Lamb


Pennsylvania's 17th

Republican PartyKeith Rothfus


South Carolina's 1st

Republican PartyMark Sanford


Texas' 7th

Republican PartyJohn Culberson


Texas' 23rd

Republican PartyWill Hurd


Texas' 32nd

Republican PartyPete Sessions


Utah's 4th

Republican PartyMia Love


Virginia's 2nd

Republican PartyScott Taylor


Virginia's 5th

Republican PartyThomas Garrett


Virginia's 7th

Republican PartyDavid Brat


Virginia's 10th

Republican PartyBarbara Comstock


Washington's 3rd

Republican PartyJaime Herrera Beutler


Washington's 5th

Republican PartyCathy McMorris Rodgers


Washington's 8th

Republican PartyDave Reichert


Washington's 9th

Democratic PartyAdam Smith


West Virginia's 3rd

Republican PartyEvan Jenkins


Wisconsin's 1st

Republican PartyPaul Ryan



The following map identifies those races that are considered battleground elections. Mouse over a district for more detailed information. You can also zoom in for a closer look.


The following criteria were the primary means for determining if a race was expected to be competitive in 2018. No specific number of criteria has to be met to label a district competitive, but all were considered in each race. More races could be competitive in 2018 than just those that meet our criteria.

1. Margin of victory (MOV) in the past House elections:

The MOV of the district in previous elections is one of the primary methods for estimating the potential competitiveness of a district in the future. Ballotpedia considers competitive races to be those with a MoV of less than 10 percent.

2. Margin of victory in the past presidential elections:

Like the MOV in past congressional elections, how a president fared in each congressional district is a big indicator of the political climate in a district. For instance, a Republican incumbent in a district that supported Hillary Clinton in 2016 is more likely to be vulnerable than a Republican incumbent in a district that backed President Donald Trump.

3. Open seats:

Incumbents have extremely high re-election rates. In 2016, 96.7 percent of congressional incumbents who sought re-election won. An open seat is traditionally far more vulnerable than one in which the incumbent is seeking re-election, even if the incumbent is unpopular.

4. Time spent in office:

The number of terms an incumbent has spent in office has an impact on how vulnerable they may be. Freshmen incumbents tend to be more vulnerable than those who have served multiple terms in office.

5. Outside race ratings:

Race ratings from other outside sources like the Cook Political Report were considered when making our initial list of battlegrounds.

6. Special highlights:

Special highlights could include anything from a rematch of the 2016 House race, to an incumbent made vulnerable due to a scandal. Any special circumstances will be taken into account here.