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 was sworn in on Tuesday as the nation's 72nd secretary of state, the first of President Donald Trump’s Cabinet nominees to take the job. Watch a video of Marco Rubio's remarks in the video player above.

Secretary of State nominee Marco Rubio is among the few of President-elect Donald Trump's cabinet proposals to have bipartisan support for the post. However, a top reporter is anticipating he won't last long at Foggy Bottom due to a combination of factors,

He’s being undermined by fellow Republicans, and that’s before he shows up to lead a workforce Trump distrusts.

Getting the SecState nominee on the record about taking Greenland, blaming Ukraine, and Elon Musk’s quest to topple European governments.

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

Rubio lost to Trump in 2016 but he’s living his best life as Secretary of State, approved unanimously by his Senate colleagues.

ET Secretary of State Marco Rubio became the first Senate-confirmed official to be sworn into President Trump’s cabinet. Photo: Elizabeth Frantz/Reuters

Marco Rubio, a veteran Republican senator who once ran against Donald Trump for the party’s presidential nomination, was confirmed as his secretary of state, the first of the president’s second-term nominees to be approved by the Senate.