The Senate on Friday confirmed Mike Waltz, the former White House national security adviser, to serve as the U.S. ambassador to the United Nations. Waltz is expected to participate in next week’s U.N. General Assembly in New York City. Three Democrats—Mark Kelly of Arizona, Jeanne Shaheen of New Hampshire, and John Fetterman of Pennsylvania—supported his confirmation. Republican Sen. Rand Paul (R-KY) was the sole opponent.

Republican Senate leadership did not advance Waltz’s separate nomination to serve as U.S. representative to the General Assembly, leaving unclear how this decision might affect his duties during the Senate’s recess. Waltz’s confirmation faced delays as Democrats challenged the process, alleging procedural violations by the Senate Foreign Relations Committee. Trump administration allies, including strategist Jason Miller, urged leaders to expedite the vote ahead of the U.N. summits.

Waltz expressed gratitude for the appointment, stating, “THANK YOU President Trump & the U.S. Senate for your trust and confidence to Make the UN Great Again.” The nomination followed Trump’s May announcement after Waltz served as his national security adviser since 2017. Waltz had faced scrutiny earlier this year after admitting to inadvertently sharing a private Signal chat with military officials discussing Yemen strikes.

At his confirmation hearing, Waltz emphasized U.N. reforms, including reviewing U.S. funding and addressing antisemitism. Before joining the Trump White House, he represented Florida’s 6th District in the House from 2019 to 2025. He will succeed Ambassador Dorothy Shea, who has held the post in an acting capacity since the start of Trump’s second term.