Tensions between the U.S. and China have been rising for some time now, and Rubio's appointment has widely been seen as a sign that Trump plans to maintain a hard line on China during his second term. One of the most outspoken China hawks in Washington, Rubio has introduced several bills targeting the Chinese Communist Party.

Rubio is seen as a steady foreign policy hand who has the confidence of Trump and Senate colleagues from both parties.

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

Watch as Marco Rubio, Donald Trump's new Secretary of State, delivered remarks to employees at the Department of State upon his arrival after he was sworn into office. The Florida Senator, 53, became the first of the president's cabinet nominees to be sworn into office on Tuesday,

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.

Marco Rubio is the first member of Donald Trump's second administration whose position was confirmed by the Senate.

Rubio, the Republican senator from Florida, is among the least controversial of Trump’s nominees and vote was decisive, 99-0.

The Senate voted on Monday to confirm Marco Rubio as President Donald Trump’s secretary of state, the first high-level Cabinet official for the new administration to be approved by the chamber.

Florida Senator Marco Rubio has promised to implement Donald Trump's "America First" agenda as the next Secretary of State.

After a unanimous confirmation vote hours after the President was inaugurated Monday, the former Senator was sworn as Secretary of State on Tuesday. Rubio promised to help Trump deliver on a foreign policy vision for which he has a “clear mandate.”