National security advisor Mike Waltz will be leave his post in the Trump administration, which comes on the heels of ...

Rubio is taking over for Mike Waltz, who is set to become the United Nations ambassador. A diver on an expedition off the ...

Fox News senior strategic analyst Jack Keane joins 'Fox & Friends' to discuss Secretary of State Marco Rubio taking on both roles and what's to come for peace talks with Russia and Ukraine.

President Trump praised Waltz’s commitment to national interests and reforms at the National Security Council, suggesting his nomination is a promotion.

US step back from peace talks and ‘won’t fly around world at drop of hat’ to mediate - It is now up to Russians and ...

In a sweltering Rose Garden on Thursday, as President Donald Trump intoned at length about restoring faith to the White House ...

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

The United States will no longer formally lead efforts to end the war between Ukraine and Russia, according to the Department ...

President Donald Trump's outgoing national security adviser Mike Waltz was photographed peaking at his phone under the table ...

Who will replace Mike Waltz? President Donald Trump's leading candidates as Secretary of State Marco Rubio steps in ...