Waltz was among high-ranking members of the administration who accidentally shared plans about a forthcoming U.S. military attack with the editor of the Atlantic magazine on the messaging app.

President Donald Trump said Thursday that he’s naming Secretary of State Marco Rubio as acting national security adviser to replace Mike Waltz, whom he

President Trump is tapping national security adviser Mike Waltz to be his ambassador to the United Nations following reports of his ouster in the midst of a controversy over a group text chat.