Savvy scammers used artificial intelligence (AI) to impersonate National Security Advisor and Secretary of State Marco Rubio ...

South Korea's National Security Adviser Wi Sung-lac (L) poses for a photo with U.S. Secretary of State Marco Rubio, who concurrently serves as the U.S. national security adviser, during their meeting ...

President Donald Trump is tapping Secretary of State Marco Rubio to replace Mike Waltz as his national security adviser, handing one Floridian two powerful titles just as he demotes another. Trump ...

Marco Rubio is now both the secretary of state and national security adviser. Just one other person, Henry Kissinger, has ever held both positions at once.

National Security Advisor Mike Waltz checks his mobile phone while attending a Cabinet meeting held by President Donald Trump at the White House in Washington, D.C., on April 30.

Secretary of State Marco Rubio is taking over for Michael Waltz as National Security Adviser, but Rubio is keeping his main job and other roles.

President Donald Trump said Thursday that he’s naming Secretary of State Marco Rubio as acting national security adviser to replace Mike Waltz, whom he is nominating for United Nations ambassador.

In addition to his existing position, Secretary of State Marco Rubio now is taking on the role of national security adviser — giving him a sweeping portfolio previously only held by one other ...