Former national security adviser Michael Waltz in the Cabinet Room of the White House in March. Shawn Thew / EPA / Bloomberg ...

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

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

Last week, however, Waltz’s phone made headlines again: on Thursday, the same day that Waltz would be ousted from his ...

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

Mike Waltz, President Trump's national security advisor, is leaving the White House weeks after he accidentally added a ...

Waltz was at the center of the Signal chat controversy, in which a journalist was accidentally included in a discussion of ...

President Donald Trump’s decision to oust his national security adviser, Michael Waltz, was the product of a slow accumulation of frustration with a former Green Beret officer who was seen as ...

Thursday was a roller coaster ride for Michael Waltz, who was removed as national security adviser and later named to be U.N.

Controversy arises as Michael Waltz reportedly uses Signal in a Cabinet meeting, igniting national security debates.- Watch ...

Three federal departments prohibited their employees from accessing TeleMessage — a message archiving app that former ...

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.