Republicans stood just one seat short of retaking the U.S. House on Monday night, but the amount of votes still to be counted in California and other states prevented The Associated Press from calling control of the chamber for the GOP.

A week after polls opened in the 2022 midterm elections, the AP has called 217 seats in the House for Republicans to 205 for Democrats, who have held the House since 2018.

Republicans have been inching closer to seizing the House since voting closed a week ago but weren’t there yet. California alone has 10 races remain to be called, and vote counting continues elsewhere.

Democratic control of the U.S. Senate was settled Saturday when Sen. Catherine Cortez Masto of Nevada won reelection, but the U.S. House majority is still in question.

WHY HASN’T THE AP CALLED CONTROL OF THE HOUSE YET?

It’s simple: Neither party has yet reached the required 218 seats.

The AP has declared winners in most contests, but a handful are outstanding.

The AP does not make projections and will only declare a winner when it’s determined there is no scenario that would allow the trailing candidates to close the gap. In some contested races where a party or candidate has a history of consistent and convincing wins, The AP can use results from AP VoteCast — a survey of American voters aimed at determining why they voted how they did — to confirm a candidate’s victory, even as soon as polls close. But some races, as it is again this year, can take days or even weeks to call.

WHAT STATES ARE STILL COUNTING VOTES?

California, the country’s most populous state, has more undetermined contests than any other. Ten races remain to be called there, with millions of votes left to count.

There are also close races in Colorado and Maine, among others, including some tight enough that they could be headed to a recount.

In Alaska, where incumbent Democrat Mary Peltola won a special election this summer to fill an open House seat held for decades by Republicans, a second round of vote tabulating could take place.

That’s because Alaska has ranked choice voting in which voters rank candidates. If no one gets more than half of the votes cast on or before Nov. 8, the person with the fewest votes gets eliminated and voters’ choices count toward their second pick. The rounds continue until two candidates are left and the one with the most votes wins.

Peltola was leading Republicans Sarah Palin and Nick Begich in a race too early to call.

WHAT OTHER CHALLENGES ARE THERE?

In 2020, former President Donald Trump challenged outcomes of the vote for president in states across the country. Those challenges failed in courts, though Trump continued to insist falsely that the race was stolen.

So far, nothing like those kinds of objections has materialized.

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Meg Kinnard can be reached at http://twitter.com/MegKinnardAP

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Check out https://apnews.com/hub/explaining-the-elections to learn more about the issues and factors at play in the 2022 midterm elections.

Follow AP’s coverage of the 2022 midterm elections at: https://apnews.com/hub/2022-midterm-elections