Who senators choose, and whether Trump ultimately endorses a candidate in the final hours, could set the tone for Trump’s attempts to assert control over the legislative branch.

U.S. President-elect Donald Trump's Republicans on Tuesday inched closer to winning a majority in the House of Representatives and with it full control of Congress, which would give Trump power to advance his agenda when he returns to the White House in January.

President-elect Donald Trump's Republican Party will control both houses of Congress when he takes office in January, Decision Desk HQ projected on Monday, enabling him to push an agenda of slashing taxes and shrinking the federal government.

In the first seriously contested Senate Republican leadership election in decades, three senators are vying to replace longtime GOP leader Mitch McConnell when he steps down from the post at the beginning of next year.

Senate Republicans are slated to elect a new leader after Sen. Mitch McConnell led the party in the Senate for almost two decades.