18 races in the House of Representatives have yet to be resolved. Only four races need to be won by the GOP to gain control of both chambers.

Here is the current position of each of these tight races as of Monday.

Alaska

At-large district

Mary Sattler Peltola is a Democratic incumbent Rep. running in Alaska’s vast congressional district. She is in a tight race with Republican Nick Begich.

Begich currently holds 49.5% of the votes to Peltola’s 45.5%. Begich has 49.5% to Peltola’s 45.5 %. After 80% of the votes are counted, 125,222 votes have been cast versus 115.089

Arizona

6th Congressional district

The race for Arizona’s 6th Congressional District is very close. The Republican candidate barely has the edge.

At the time of this writing, Juan Ciscomani, a Republican State Representative, is only a few votes ahead of Kirsten Engel, formerly a Democrat State Lawmaker. After 83% of the ballots have been counted, 180,913 votes are in the bag versus 178.820.

California

13th Congressional district

The race for California’s 13th Congressional District, which is highly contested, remains undecided.

Duarte is leading the race, with 51.3% and 48.8% of voters are undecided. The pair are only separated by a little more than 3,000 votes.

21st Congressional district

On Monday morning, incumbent Democratic Rep. John Costa was leading his Republican opponent Michael Maher by 50.5%.

Costa is leading by just over 1,000 votes after 66% of votes have been counted.

22nd Congressional district

On Monday, Republican incumbent Rep. David Valado led Democratic Challenger Rudy Salas 53.6%-45.6%. Valado’s lead is just under 10,000 votes.

27th Congressional district

On Monday, Republican incumbent Rep. Mike Garcia sat 2 points behind Democratic opponent George Whitesides.

With 80% of the votes counted, Whitesides is leading by just a few thousand votes.

39th Congressional district

On Monday, Democratic incumbent Rep. Mark Takano had a 12-point lead over Republican challenger David Serpa. Takano is in the lead by 21,000 votes, with 70% of the votes counted.

41st Congressional district

Ken Calvert is the Republican incumbent Rep. He leads Will Rollins 51.4% to 48.6%. Calvert is ahead by about 8,000 votes.

45th Congressional district

Michelle Steel is the incumbent Republican Rep. She led her Democratic opponent Derek Tran 51.1% on Monday. Steel holds a lead of about 6,000 votes after 80% of the votes have been counted.

47th Congressional district

The race to replace the outgoing Democratic Rep. Katie Porter in California’s 47th Congressional District is razor thin.

Democrat Dave Min is vying for the open seat against Republican Scott Baugh. Min is leading by less than one %.

Min leads by just under 3,000 votes.

49th Congressional district

As Monday morning dawned, Democratic incumbent Rep. Mike Levin had a 3-point lead over Republican challenger Matt Gunderson.

Levin is in the lead by approximately 11,000 votes, with 77% of votes counted.

Colorado

8th Congressional district

Rep. Yadira Caaveo is a Democrat in Colorado who trails Republican state Rep. Gabe Evans, by less than 1%, after 96% of votes have been counted.

Iowa

First Congressional District

Mariannet Miller Meeks. Republican incumbent Rep. Marianne Miller-Meeks is leading Christina Bohannan by less than 1% after 99% of the votes have been counted. Miller Meeks leads by just over 1,000 votes.

Louisiana

6th Congressional district

Cleo Fields, Democratic candidate for the 6th district, leads Elbert Guillory, Republican candidate, by 13 points with 99% of the votes reported. The field lead was just under 49,000 votes on Monday.

Maine

The 2nd Congressional District

As of Monday, Democratic incumbent Jared Golden is just a hair’s breadth ahead of Republican opponent Austin Theriault.

Golden is ahead by less than 800 votes, after 98% of the votes.

Ohio

9th Congressional district

Marcy Kaptur is ahead of her Republican opponent Derek Merrin after 99% of the votes are counted. Kaptur leads by just over 1,000 votes.

Oregon

5th Congressional district

After 87% of the votes on Monday, Republican incumbent Rep. Lori Chavez DeRemer is trailing her Democratic opponent Janelle Bynum.

Bynum is leading by just over 10,000 votes.

Washington

4th Congressional district

Dan Newhouse, Republican incumbent, is ahead by 5 points of Jerrod Sessler, a fellow Republican, with 84% of the votes counted.

Newhouse led by just over 12,000 votes as of Monday.