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

U.S. President Donald Trump said 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. 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