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

Senate Democrats predict that former National Security Adviser Mike Waltz will have a "brutal confirmation hearing" for his ...

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 ...

A hacker managed to breach TeleMessage, a company that sells a modified version of Signal to the US government. Mike Waltz was spotted using it last week.

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

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

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

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 ...

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

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