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

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

A new analysis of TM Signal’s source code appears to show that the app sends users’ message logs in plaintext. At least one ...

The communications app TeleMessage, which was spotted on former US national security adviser Mike Waltz's phone, has ...

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

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

President Trump recently discouraged the use of the Signal app after controversy over a group chat of administration ...

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

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

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

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

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