President Donald Trump announced former national security advisor Mike Waltz as his choice to serve as ambassador to the U.N.

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

Donald Trump appointed Mike Waltz to be the next U.S. ambassador to the United Nations after stripping him of his original ...

Trumps White House purge is making headlines after he abruptly fired National Security Adviser Mike Waltz. Reports suggest a wave of staff dismissals could follow as Trump looks to tighten loyalty ...

The Trump adviser responsible for the Signal group chat that became a national security scandal is being replaced and nominated as the next US ambassador at the United Nations.

President Donald Trump's outgoing national security adviser Mike Waltz was photographed using Signal on his phone during Wednesday's Cabinet meeting.

Welcome to the online version of From the Politics Desk, an evening newsletter that brings you the NBC News Politics team’s latest reporting and analysis from the White House, C ...

P resident Donald Trump is replacing his National Security Adviser, Mike Waltz, and nominating him to be Ambassador to the United Nations, he announced Thursday, marking the first major personnel ...

Waltz publicly took full responsibility for the mishap, acknowledging the error as "embarrassing". The incident sparked bipartisan criticism, with some lawmakers calling for Mr Waltz's resignation and ...

Waltz's deputy, Alex Wong, who was also ousted this week, reportedly remains at the National Security Council.

WASHINGTON − Mike Waltz is out as President Donald Trump's national security adviser and is instead his new nominee for ambassador to the United Nations in a major shake-up of Trump's national ...

Donald Trump has announced he is removing his national security adviser, Mike Waltz, and appointing him instead to the role of UN ambassador. The announcement followed hours of breathless ...