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

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 ...

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 ...

"I think it will be a brutal confirmation hearing," Senate Intelligence ranking member Mark Warner, D-Virginia, said on CNN. ...

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

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

Donald Trump has tapped secretary of state Marco Rubio to be interim national security adviser after firing Mike Waltz and ...

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

National Security Advisor Michael Waltz, who was fired the day before, will become the US Ambassador to the UN.US President ...

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