Message contents and government official contact information were obtained during the breach, 404 Media reports.

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 ...

In a continuation of Signalgate, Hegsgeth came under scrutiny again last month, when the Washington Post reported that he not ...

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 ...

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

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

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

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

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 ...