Senate Republicans will elect a new leader for the first time in 17 years on Wednesday. Originally thought to be a two-person race, a last-minute addition has turned up the intensity.

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.