Republicans have won full control of Washington, but Democrats will retain two key levers of power to shape legislative outcomes in Donald Trump’s second term.

With votes still being counted, here's a look at the key races that remain uncalled by the NBC News Decision Desk (read more on how those races are called on NBCNews.com).

Voters have given the once-fractured House GOP a second chance at leading by delivering Republicans another razor-thin House majority in the 2024 elections

Trump was looming over the Senate majority leader three-way race. Musk and other Trump allies, including Tucker Carlson, backed Sen. Rick Scott (R-FL), who has close ties to the president-elect’s incoming chief of staff, Susie Wiles. Scott was an insurgent candidate facing Thune and John Cornyn of Texas.

Back in Washington for the first time since his election victory, Trump tells House Republicans that 'it's nice to win'

Returning lawmakers will be choosing the leaders for the next Congress and finishing work on the remaining priorities of the outgoing 118th Congress.

Republicans have secured their monopoly on power in Donald Trump’s new Washington, retaining their majority in the House of Representatives, CNN projected Wednesday, after picking up seats in California and Arizona and ushering in a dramatic new era of right-wing populist rule.

Republican Dan Newhouse wins reelection to U.S. House in Washington's 4th Congressional District.

Today: What to watch on tech as Congress returns to Trump’s Washington Federal lawmakers are filtering back to Washington this week with a long to-do list on tech policy, including figuring out their next moves on artificial intelligence and child online safety.

There were no protests on the streets as Donald Trump returned to Washington. He visited the nation's capital on Wednesday, a week after emerging victorious in the presidential election.

Donald Trump’s increasingly provocative Cabinet picks have left some Republican senators aghast and Washington in shock.