President-elect Donald Trump has selected Florida Senator Marco Rubio as his nominee for Secretary of State, positioning a former rival who has become one of Trump’s strongest allies to take on the role of the nation’s top diplomat. Rubio, a prominent conservative voice, is well-known for his hawkish stance on foreign policy, particularly toward China, Cuba, and Iran. He was a finalist for Trump’s running mate earlier this year, solidifying his close ties with the president-elect. “He will be a strong Advocate for our Nation, a true friend to our Allies, and a fearless Warrior who will never b…