For weeks, UN officials have been on tenterhooks waiting to see who US President Donald Trump would appoint as his ambassador ...

"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.

US president Donald Trump said ­yesterday he is nominating his national security adviser Mike Waltz to serve as United ...

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

Mike Waltz, the national security adviser for President Donald Trump, is seen in photos using Signal during a Cabinet meeting ...

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

Mr Waltz came under searing scrutiny in March after revelations that he added journalist Jeffrey Goldberg to a private text ...

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.

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

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

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