Both sides agree that it will be Trump who decides if Rubio is MAGA enough to remain a member of his administration and represent his views around the world. He unceremoniously fired his first secretary of State, Rex Tillerson, via tweet, and has long made clear he views foreign policy as his domain.

The Senate has unanimously approved Marco Rubio as secretary of state, putting the fellow senator in the frontline of Trump's often confrontational diplomacy.

Hours after Trump was sworn in as president, senators confirmed his first Cabinet pick and advanced the nominations of several others through committee.