Because it's a secret vote, we don't know exactly who voted for Thune to be the Senate Majority Leader, but we know a few of his public supporters.

Kentucky Sen. Mitch McConnell announced he would step down from his leadership post earlier this year, ending his historic run.

President-elect Donald Trump congratulated Sen. John Thune on winning election to the role of Senate majority leader, declaring that the lawmaker "will do an outstanding job."