With a dozen races still to be called, the G.O.P. was two seats away from the 218 that would allow the party to claim a coveted governing trifecta: control of the House, Senate and White House.

Republican Rep. Juan Ciscomani won reelection to a U.S. House seat in southeastern Arizona in a rematch that pitted him against the Democrat he narrowly beat two years ago. Ciscomani defeated Democrat Kirsten Engel in the race for Arizona’s 6th Congressional District,

Republicans will hold a majority of seats in Congress, according to Edison Research, giving the party legislative control to pursue Trump's policies of tax cuts and deregulation.