As sources on Thursday confirmed Mike Waltz’s exit from his post as national security adviser, the impact of the U.S. government group chat leaks known as Signalgate, continues to expand.

President Donald Trump announced he will nominate Mike Waltz to be the next U.S. ambassador to the United Nations just hours after reports came out that the national security adviser was getting ousted from his current position.

White House national security adviser Mike Waltz is set to depart the administration, according to two people familiar with the matter on Thursday, marking the first major staff shakeup of President Donald Trump’s second term.