Republicans have officially won a full trifecta of power in Washington, D.C., following GOP victories in several key U.S. House contests.

In yet another blow to Democrats, Donald Trump will begin his presidency with a trifecta of Republican control in Washington.

The party protected vulnerable incumbents and picked off Democrats in competitive districts, handing the president-elect a unified Congress to enact his agenda.

Republicans have won enough seats to control the U.S. House, completing the party’s sweep into power and securing their hold on U.S. government alongside President-elect Trump.

Republicans have clinched the White House and Congress, though with a House majority so slim that it might hamper

Republicans will control both houses of Congress next year, giving Donald Trump control of all three branches of government. The GOP has held onto their narrow majority, allowing them the chance to pass much of the President-elect’s agenda when he is sworn in next year.