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.

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

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

Sen. Tammy Duckworth (D-IL) confirmed Sunday she would not support Mike Waltz in a Senate vote determining whether he will be ...

President Donald Trump announced that Mike Waltz had been ousted as national security advisor. He was previously caught up in ...

Donald Trump removed Mike Waltz from his post as national security adviser — marking the first significant personnel overhaul ...

World: The photo revealed that Waltz had been texting several high-profile figures, including Vice President JD Vance, Marco ...

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

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

Mike Waltz faces scrutiny after a photo revealed his use of TM SGNL, a modified Signal app, raising security concerns due to ...

President Donald Trump has nominated Mike Waltz to be the next U.S Ambassador to the United Nations just hours after firing ...