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

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

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

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

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

National security adviser Mike Waltz and his deputy, Alex Wong, will be leaving their posts, CBS News reported Thursday, ...

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

The images, captured by Reuters, show Mike Waltz, the former national security adviser, using the TM SGNL app, which allows ...

The Signal group chat scandal and Waltz’s hawkish stance on Iran are being touted as the reasons for his ouster as NSA.

Mike Waltz is expected to be ousted from his role as Donald Trump's national security adviser amid the fallout over ‘The ...