"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 ...

The Democratic senator will not vote to confirm the ex-national security adviser, who she says is "failing up" after putting ...

Mike Waltz was fired as national security advisor after being caught using the encrypted messaging app Signal during a ...

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

Mike Waltz just can’t seem to quit Signal. President Donald Trump’s outgoing national security adviser, the subject of ...

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

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

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

Waltz served as Trump’s national security adviser until Thursday, when the president announced he was moving Waltz to be the next ambassador to the U.N.