Rubio -- long known as a Russia and China hawk in the Senate -- has been accused of dialing back his interventionist foreign policy approach to align with Trump's positions and may face fresh criticism from opponents who believe he might prioritize serving as a yes man to president over serving the country.

Senator Marco Rubio warned of China’s growing threat, and he backed NATO but said Europe needed to do more to help protect itself. His friendly, five-hour confirmation hearing seemed to all but guarantee he would be the next secretary of state.