With four hats, including national security adviser, the former Trump rival is defying predictions he’d be a weak player.

U.S. Secretary of State Marco Rubio is set to replace Mike Waltz as the President's National Security Advisor, reports ...

The fired national security adviser engaged in intense coordination with Israeli Prime Minister Benjamin Netanyahu about ...

US Secretary of State Marco Rubio is set to replace Mike Waltz as the president's national security adviser, reports Politico ...

The president said Secretary of State Marco Rubio will serve simultaneously as acting national security adviser while ...

There is a very real possibility that Trump keeps Rubio as both secretary of state and national security adviser, according ...

Secretary of State Marco Rubio has been thrown into two top national security roles at once after President Donald Trump ...

Former National Security Advisor John Bolton went off on President Donald Trump's friend and special envoy as "a disaster in the making" who "doesn't know anything" about the things he is in charge of ...

In March, the editor of the Atlantic magazine revealed that national security adviser Michael Waltz had inadvertently ...

President Donald Trump has ousted National Security Adviser Mike Waltz and announced that he will nominate him as the next ...

President Donald Trump is forging ahead with his domestic and foreign policy agenda as he pushes for trade deals. Follow for ...