It’s been a week since Americans cast their votes on Election Day, and control of the U.S. House of Representatives remains undetermined.

Republicans, who will control both the White House and the Senate, are likely to remain in power in the House of Representatives, giving newly elected President Donald Trump the opportunity to implement many of his policies.

As of Tuesday afternoon, 16 races remain uncalled. Democrats would need to win 13 to reach the 218 seats needed to take control of the House of Representatives, which would lead to a divided government and control of Trump’s agenda. In only eight of the outstanding races are Democrats in the lead.

Most of the uncalled House races are in California, where efforts to make voting easier have extended the time it takes to count all votes. California also has more than 22 million registered voters, and the vast majority vote by mail, with ballots postmarked by Election Day still able to be counted up to seven days later.

One of the most closely watched races is in Alaska, where Republican Nick Begich III is leading incumbent Rep. Mary Peltola for the state’s lone seat in the House of Representatives. Begich’s grandfather, former Rep. Nick Begich, once held that seat, but his plane disappeared while traveling to Juneau during his 1972 re-election campaign.

Alaska has ranked choice voting, so if neither candidate receives 50% of the vote, the race will be decided on November 20.

Another close race is in Maine’s 2nd District, where incumbent Democratic Rep. Jared Golden narrowly leads Republican challenger Austin Theriault. That race will also be decided by an automatic recount of the rankings, starting on Tuesday afternoon.

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Pennsylvania’s House races have all been called. Republicans won 10 of the Commonwealth’s 17 seats in Congress, flipping two seats: the 7th District in the Lehigh Valley, where Ryan Mackenzie upset Rep. Susan Wild, and the 8th District in Northeastern Pennsylvania, where Robert Bresnahan upset Rep. Matt Cartwright defeated.

Republicans will also face at least two vacancies. The first will take place in New York, thanks to Trump’s decision to appoint Rep. Elise Stefanik (R., NY) as the next ambassador to the United Nations. It is unclear when Stefanik will resign her seat; a special election cannot be scheduled until she officially resigns. Once that happens, the special election will take place between 70 and 80 days later.

The second vacancy will be in Florida, replacing the seat vacated by Rep. Mike Waltz, whom Trump appointed as national security adviser. Florida Governor Ron DiSantis will have to call a special election to fill the seat, a process that will likely take a few months.

Here are the US House races that still haven’t been called: