Trump nominates Mike Waltz for UN ambassador in major shake-up of national security team

President Donald Trump said Thursday that he is nominating national security adviser Mike Waltz as United Nations ambassador while Secretary of State Marco Rubio would take over Waltz's duties on an interim role.

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He announced the major shake-up of his national security team shortly after news broke that Waltz and his deputy are leaving the administration. Waltz has been under scrutiny for weeks after reporting from The Atlantic that he had mistakenly added the magazine's editor-in-chief to a Signal chat being used to discuss military plans.

"I am pleased to announce that I will be nominating Mike Waltz to be the next United States Ambassador to the United Nations. From his time in uniform on the battlefield, in Congress and, as my National Security Advisor, Mike Waltz has worked hard to put our Nation's Interests first," Trump wrote on social media.