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).

Donald Trump has had few defenders in Congress as reliable as Matt Gaetz. That kinship was rewarded Wednesday when Trump named Gaetz as his pick for attorney general, turning to a conservative loyalist in place of more established lawyers who’d been seen as contenders.

The visit is a traditional part of the peaceful handoff of power — a ritual in which Trump himself declined to participate four years ago.

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.

Donald Trump returned to Washington on Wednesday as president-elect where he headed to the White House for the first time in four years

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

Four years after leaving the White House in fury, President-elect Donald Trump returned to his old and future home Wednesday. Here are five takeaways.

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.