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

A photo taken this week showed Mike Waltz using an app that looks like—but is not—Signal to communicate with top officials.

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

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

"I think it will be a brutal confirmation hearing," Senate Intelligence ranking member Mark Warner, D-Virginia, said on CNN. ...

An unofficial version of Signal, TeleMessage, used by Mike Waltz, Donald Trump's former National Security Adviser, has ...

There are some hurdles former National Security Advisor Mike Waltz must clear first before the United Nations ambassador job ...

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

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

Mike Waltz was photographed using Signal in a Cabinet meeting the day before Trump announced he was replacing him as national ...

National security adviser Mike Waltz and his deputy, Alex Wong, are exiting the administration, CBS News’s Jennifer Jacobs ...

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