Both come down to California, which has seven of the remaining 10 uncalled races amid the state’s protracted vote count.

The GOP candidate leads in four of the 10 to-be-determined contests, including two in California by significant margins: GOP Rep. Mike Garcia north of Los Angeles and Republican candidate Kevin Kiley in the High Sierras. Either race could be called as early as Tuesday night.

And there are two other California races — an open seat in the Central Valley and Democratic Rep. Katie Porter’s reelection race in Orange County — where Republicans remain firmly in the hunt to pad their narrow advantage. Republican Scott Baugh slashed Porter’s lead in Monday’s vote count to around 2,900 votes when Orange County began counting ballots cast last Tuesday on Election Day, but Porter surged back in Tuesday’s update, jumping back to a 3,800-vote lead.

“Pre-election day votes tend to favor Democrats and Election Day votes tend to favor Republicans. I’m hopeful the remaining Election Day votes continue to favor Republicans,” Baugh told the Orange County Register in a statement Monday night.

Republicans approached the brink of the majority thanks to five victories on Monday night: The AP declared Reps. David Schweikert (R-Ariz.), Ken Calvert (R-Calif.) and Michelle Steel (R-Calif.) won their races, and GOP candidates Juan Ciscomani and Brandon Williams secured open seats in Arizona and New York, respectively.

Democrats have already protected their 50-seat Senate majority, and they can add a 51st seat if Democratic Sen. Raphael Warnock defeats GOP challenger Herschel Walker in a runoff election on Dec. 6.

But a GOP House victory — even by the narrowest of margins — would empower the party to stymie Biden’s legislative agenda, step up oversight of his administration and launch investigations of his family members, as Republicans have threatened to do.

As Republicans look for that 218th Republican House seat, Garcia’s race in Southern California may be the most imminent call. Democrat Christy Smith — who is mounting her third bid for the seat after losing to Garcia by a wide margin in a 2020 special election and a very small margin in the 2020 general election — has trailed Garcia throughout the vote count. The latest results show Garcia ahead, 54 percent to 46 percent, with roughly two-thirds of the estimated votes tallied.

The latest AP count pegs Democrats at 208 House seats. They have the lead in six races, including the two tenuous California districts mentioned earlier. But winning all of them would still leave the party four seats shy of the majority.

Democrats did get some good news Tuesday, when The AP projected Democrat Yadira Caraveo will be Colorado’s newest member of Congress. Caraveo’s GOP opponent, Barbara Kirkmeyer, had conceded defeat last week in a newly drawn district, but the race remained uncalled.

But they’ll have to wait another day to clinch a seat in Maine, where election officials had planned to complete the ranked-choice tabulation needed because neither Democratic Rep. Jared Golden (48.2 percent) nor former GOP Rep. Bruce Poliquin (44.9 percent) secured a majority of the vote last week, according to unofficial results. Officials encountered a data issue that postponed the tabulation until Wednesday.

Golden only needs a small percentage of second-place votes to secure reelection.