After taking the oath of office, Marco Rubio promised that every action taken by the State Department will be determined by the answers to three questions.

US Secretary of State Marco Rubio on his first full day in office Tuesday warned jointly with Japan, India and Australia against coercive actions in Asia, in a veiled but clear warning to China over its actions at sea.

The Senate voted unanimously to confirm Sen. Marco Rubio's as secretary of state on Monday, making him the first member of President Donald Trump's second Cabinet.

Marco Rubio has been confirmed by the Senate for secretary of state with unanimous support. Now comes the hard part that could make or break his tenure: retaining the full backing of his new boss, Donald Trump.

The Senate has confirmed Marco Rubio as secretary of state, giving President Donald Trump the first member of his Cabinet. The vote was unanimous.

Alaska Senator Dan Sullivan as Presiding Officer announces the unanimous vote for Florida Senator Marco Rubio to serve as secretary of state in the second Trump cabinet as the first nominee hours after Trump was inaugurated a second time.

“Congratulations to Marco Rubio on his confirmation as the new U.S. Secretary of State,” the Greek Ministry of Foreign Affairs stated in a post on Twitter. “Greece remains steadfast in its commitment to strengthening our strategic relations and the deep bonds that unite our nations,” the statement continued.

Secretary of State Marco Rubio pledged in his first remarks as top US diplomat to ensure that the agency he now leads isn’t left behind in shaping US foreign policy.

Marco Rubio has changed a lot since he ran for president in 2016. But his political evolution has made him uniquely qualified to be Trump's secretary of state.

Marco Rubio, the first Hispanic secretary of state, replaced Antony Blinken hours after Donald Trump’s inauguration.

The joint statement with Quad partners stood in sharp contrast to Donald Trump’s frequent dismissal of US allies.