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

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.

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

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

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

The Democratic senator will not vote to confirm the ex-national security adviser, who she says is "failing up" after putting the U.S. at risk with the Signalgate scandal.

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

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

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

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

Bolton says Waltz’s UN nomination is a “soft landing” and expects tough questions on his handling of classified information.