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.

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.

John Thune, John Cornyn and Rick Scott are vying to succeed Mitch McConnell as the Republicans leader in the U.S. Senate.