Mike Waltz's exit from the Trump administration comes on the heels of the Signal chat scandal. Here's what happened.

The Trump administration ousted national security advisor Mike Waltz and other staffers with the National Security Council, ...

National security adviser Mike Waltz is leaving his White House post, although soon after reports about his departure were ...

Mike Waltz, the national security adviser for President Donald Trump, is seen in photos using Signal during a Cabinet meeting ...

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

More than a month after he drew criticism for using Signal to discuss an impending military attack, Waltz was seen using what ...

President Donald Trump says he is nominating national security adviser Mike Waltz as United Nations ambassador while ...

President Donald Trump's outgoing national security adviser Mike Waltz was photographed using Signal on his phone during ...

Donald Trump appointed Mike Waltz to be the next U.S. ambassador to the United Nations after stripping him of his original ...

Mike Waltz was removed as Trump's national security adviser and faces Senate confirmation as the new nominee to be ambassador to the U.N.

A phone app that Mike Waltz, President Donald Trump’s former national security adviser, apparently used to save his text ...

"I think it will be a brutal confirmation hearing," Sen. Mark Warner said of Mike Waltz. "I think he's going to have tough ...