Mike Waltz, Trump’s Former National Security Adviser, Confirmed As US Ambassador To UN

Last Updated:September 20, 2025, 06:28 IST

Waltz’s confirmation comes just in time for the upcoming United Nations General Assembly (UNGA) session.

Waltz’s stint as Trump’s national security adviser was short-lived (Image: Mandel NGAN/AFP)

Mike Waltz, who briefly served as Donald Trump’s national security adviser earlier this year, has now been confirmed as the United States ambassador to the United Nations. With Waltz’s confirmation on September 19, the last key position within the Republican administration has finally been filled, reported Reuters.

The Senate vote was 47 in favour and 43 against, largely following party lines. A few Democrats broke ranks to support Waltz, including Senators John Fetterman of Pennsylvania, Mark Kelly of Arizona, and Jeanne Shaheen of New Hampshire. Meanwhile, Republican Senator Rand Paul was the only member of his party to side with Democrats in opposing the nomination.

Waltz’s confirmation comes just in time for the upcoming United Nations General Assembly (UNGA) session, where world leaders gather in New York next week. However, there remains some uncertainty regarding his exact role at the event. While the Senate confirmed him as the US ambassador to the UN and the US representative on the Security Council, it did not approve him as the US representative to the General Assembly. This separate designation was blocked by Democratic senators, according to sources familiar with the Senate’s discussions.

Waltz’s stint as Trump’s national security adviser was short-lived. He served for only a few weeks during Trump’s second term before being removed in May after accidentally adding a journalist to a private Signal chat used to discuss sensitive military plans.

Following Waltz’s departure, Trump appointed Secretary of State Marco Rubio as interim national security adviser, a position Rubio continues to hold. Waltz, however, has denied being forced out and has defended the cybersecurity measures of the chat.

After the withdrawal of the previous nominee, Representative Elise Stefanik, due to concerns related to the Republican majority in the House, Trump selected Waltz in May to represent the US at the UN. His confirmation now closes a key chapter in filling high-level diplomatic roles within the administration.

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