State of the Union: Rubio’s selection had been first rumored Monday....

Following a closed-door vote, Sen. John Thune (R-SD) won the leadership role after a tight three-way race between himself and Sens. John Cornyn (R-TX) and Rick Scott (R-FL)....

Sen. Rick Scott (R-FL) also vowed to help incoming Senate Republican Leader John Thune accomplish President-elect Donald Trump's agenda in the new Congress....