Mike Waltz Resigns as National Security Adviser, Nominated UN Ambassador

President Donald Trump removed National Security Adviser Mike Waltz just over 100 days into his second term and nominated him to become the U.S. ambassador to the United Nations. Waltz was offered several high-profile diplomatic positions before selecting the UN ambassadorship, a move confirmed by the White House. His departure follows a controversy in which he mistakenly added a journalist to a Signal group chat discussing sensitive military operations, an incident widely referred to as 'Signalgate.' Secretary of State Marco Rubio will temporarily assume the national security adviser role while continuing to lead the State Department, and Waltz's deputy, Alex Wong, will assist during the transition. The administration has framed Waltz's reassignment as voluntary, but the timing closely follows the Signal chat controversy. Trump's team is still considering candidates for the consequential ambassadorship to Saudi Arabia.