Republicans hold a slim majority in the House of Representatives, though the size of that narrow margin will not be known until the final three undecided races are called.

On Wednesday, the Associated Press called Ohio's 9th Congressional District for Democratic incumbent Rep. Marcy Kaptur, and Alaska's at-large district for Republican entrepreneur Nick Begich, who flipped the seat red by ousting Democratic incumbent Rep. Mary Sattler Peltola.

The three House races that remain uncalled as of Thursday are in California and Iowa. 

The balance of power currently sits at 219 seats for Republicans, and 213 for the Democrats.

WHAT TRUMP'S TRIFECTA IN HIS FIRST ADMINISTRATION ACCOMPLISHED, AND WHERE THEY FAILED: FLASHBACK

Republican Rep. John Duarte is leading former Democratic state assembly member Adam Gray in California’s 13th Congressional District, but the highly contested race remains uncalled as of Thursday morning.

Roughly 96% of the vote has been counted, and Duarte holds a slim 50.1% to 49.9% lead. The two candidates are separated by just 351 votes at 101,217 to 100,866.

Democratic challenger Derek Tran is holding his lead over Republican incumbent Rep. Michelle Steel in the 45th District. Steel had been in the lead by a few hundred votes late last week, but Tran is now up 397 votes with a total of 155,862 to Steel's 155,465 votes as of Thursday morning.

Roughly 97% of the votes have been counted for the district. 

DEMOCRATS PRIVATELY GRIPE ABOUT PELOSI'S ‘DAMAGING’ POST-ELECTION COMMENTS: ‘SHE NEEDS TO TAKE A SEAT’

Republican incumbent Rep. Mariannet Miller-Meeks holds a less than 1% lead over challenger Christina Bohannan with 99% of the votes counted. Miller-Meeks' lead sits at just over 800 votes.

CLICK HERE TO GET THE FOX NEWS APP

Bohannan has requested a recount in her bid to unseat Miller-Meeks. The Associated Press has not yet called the race because the margin was close enough that it could prompt a recount.

 Miller-Meeks has declared victory and said she was confident in her lead.

Fox News' Anders Hagstrom, Chris Pandolfo and Jasmine Baehr and the Associated Press contributed to this report.