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

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 ...

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

Sen. Tammy Duckworth (D-IL) confirmed Sunday she would not support Mike Waltz in a Senate vote determining whether he will be ...

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

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

The images, captured by Reuters, show Mike Waltz, the former national security adviser, using the TM SGNL app, which allows ...

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, ...

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

National security adviser Mike Waltz and his deputy, Alex Wong, will be leaving their posts, CBS News reported Thursday, ...