Trump said he's nominating Michael Waltz to be ambassador to the United Nations, while Secretary of State Marco Rubio will ...

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

The newly appointed interim national security adviser is preparing to stay in that role for up to six months, a person close ...

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

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

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

Waltz was among high-ranking members of the administration who accidentally shared plans about a forthcoming U.S. military ...

President Donald Trump said that he’s naming Secretary of State Marco Rubio as acting national security adviser to replace ...

State Department spokeswoman Tammy Bruce learned from a reporter that her boss, Secretary of State Marco Rubio, got an ...

Secretary of State Marco Rubio's new job as national security adviser sets the former Donald Trump rival up for a bigger role ...

U.S. President Donald Trump ousted his national security adviser Mike Waltz on Thursday and named Secretary of State Marco ...