President Donald Trump made a sudden move by appointing Michael Waltz as the new ambassador to the United Nations shortly after the news came out that he was being removed as the national security adviser.

Waltz, the former congressman, was unexpectedly chosen by Trump for this diplomatic role following his dismissal from the National Security Council.

His termination was a result of his involvement in the ‘Signalgate’ controversy, where he mistakenly included an editor in a confidential group chat regarding military actions against the Houthis in Yemen.

Trump’s previous pick for the U.N., Rep. Elise Stefanik, R-N.Y., was dropped from consideration due to the Republicans’ tiny majority in the House of Representatives.

That opened up a spot for a replacement for the top unofficial Cabinet job based out of New York City. 

The president revealed the shocking news on Truth Social after wrapping up a National Day of Prayer event. 

Unlike the national security job – which Waltz held as of Thursday morning – the U.N. post requires Senate confirmation.

Republicans could push the nomination through on a simple majority, although Waltz earned some supportive language from Democrats Thursday who weren’t expecting his ouster.

Trump’s firing of Waltz from heading the National Security Council was the first ousting of a cabinet secretary in this administration, the Daily Mail confirmed.

Marco Rubio, who spoke forcefully at Wednesday’s cabinet meeting while refusing to reveal if there are talks to bring back a man mistakenly deported to Venezuela, will take on the security advisor role on a temporary basis.

National Security Adviser Michael Waltz looks at his phone as he prepares for a TV interview at the White House on Thursday immediately before his firing

He is becoming Trump’s Mr. Fix It, also serving as acting administrator as U.S.A.I.D. after the administration dismantled the agency. 

When Trump fired the national archivist, he made Rubio acting archivist of the National Archives and Records Administration. That gives him a total of four administration jobs, including the one that makes him fourth in line to the presidency.

It comes weeks after Waltz unwittingly added a journalist to a highly sensitive group chat on the Signal app detailing bomb strike plans against Houthis in Yemen.

The mistake quickly devolved into the biggest scandal of Trump’s second term so far and left the president grappling with negative press fallout. 

Waltz joins an expansive club of national security advisors Trump has replaced or fired. The first was retired Gen. Mike Flynn, followed by H.R. McMaster and John Bolton. The final security advisor of Trump’s first term was Robert O’Brien.   

‘From his time in uniform on the battlefield, in Congress and, as my National Security Advisor, Mike Waltz has worked hard to put our Nation’s Interests first,’ Trump wrote in his post, referencing Waltz’s service as a Green Beret.

‘I know he will do the same in his new role. In the interim, Secretary of State Marco Rubio will serve as National Security Advisor, while continuing his strong leadership at the State Department. Together, we will continue to fight tirelessly to Make America, and the World, SAFE AGAIN. Thank you for your attention to this matter!’

‘As we advance our America First Agenda, it is essential that we maintain EVERY Republican Seat in Congress,’ Trump wrote, explaining the decision.

Waltz reposted the president’s statement on X. 

‘I’m deeply honored to continue my service to President Trump and our great nation,’ he said. 

Journalist Mark Halperin first reported on his 2Way YouTube show that there was ‘unhappiness throughout the national security establishment’ with Waltz and his deputy national security adviser Alex Wong due to the Signal breach of security.

‘This has to do about competence, not ideology,’ he said. 

Halperin specified that the timing was uncertain, noting that the president had not settled on a replacement.  

‘I do believe he has made up his mind, but he could change his mind,’ he said. 

Check your downtime setting: Waltz could be seen checking his messages during Wednesday’s two-hour cabinet meeting 

Waltz has kept up lines of communication with Vice President JD Vance and DNI Tulsi Gabbard  after the Signal scandal

Trump announced the move shortly after hosting a National Day of Prayer event in the Rose Garden

An attendee kneels in front of the stage as Paula White, senior advisor to the White House Faith Office, leads a prayer next to a sitting U.S. President Donald Trump, during the National Day of Prayer, in the Rose Garden at the White House in Washington, D.C., U.S., May 1, 2025

Secretary of State Marco Rubio will serve as acting national security advisor

US National Security Adviser Michael Waltz at the White House

Waltz participated in a Cabinet meeting hosted by Trump on Wednesday, one day before his ouster

A spokesperson for the White House National Security Council did not respond to a Daily Mail request for comment. 

Waltz appeared in an interview on Fox and Friends Thursday morning, giving no indication that he was about to lose his job. 

He trumpeted the completion of a rare minerals deal with Ukraine as ‘good for the American taxpayer’ and ‘good for Ukraine’ to help it grow their economic development and security. 

Waltz also participated in a Cabinet meeting hosted by Trump on Wednesday.

He had kept his job despite the ‘Signalgate’ scandal in March.

Waltz was responsible for mistakenly adding Atlantic editor Jeffery Goldberg to a Signal chat with 17 high-ranking officials about military strikes in Yemen.

Goldberg published the digital messages in full at The Atlantic, leading to weeks of negative news coverage of the administration and calling into question Secretary of Defense Pete Hegseth’s leadership.

U.S. National Security Adviser Michael Waltz (L) listens during a Cabinet meeting at the White House

National Security Adviser Mike Waltz speaks during a television interview at the White House,

Trump did not fire Waltz at the time, partially because he did not want to give Goldberg the satisfaction. 

But Waltz suffered public humiliation from the scandal especially after his embarrassing Fox News interview in which he tried to to explain the mistake.

It also damaged his reputation in the West Wing. 

Waltz took responsibility for the mistake, but struggled to explain how Goldberg’s number was in his phone to begin with, even as he stressed that he had never spoken to him before. 

‘Well, if you have somebody else’s contact and then it, and then somehow it gets sucked in,’ he said to Fox News host Laura Ingraham. 

Trump gave Waltz a less than enthusiastic endorsement in an interview with The Atlantic last week. 

‘Waltz is fine. I mean, he’s here. He just left this office,’ Trump said. ‘He’s fine. He was beat up also.’

Waltz’s ouster takes place after journalist and Trump loyalist Laura Loomer met with the president in early April to share information she had about members on his national security council staff.

‘VETTING MATTERS Don’t ever forget that,’ she wrote, in just one of her triumphal posts.

In another, on the firing of Waltz deputy Alex Wong, she wrote simply: ‘SCALP.’ 

Several people were fired from the National Security council after the president’s meeting with Loomer, but Trump said his decision was not a result of her reporting.

‘Laura Loomer is a great patriot. She’s a very strong person,’ Trump said. ‘She’s been in the party a long time, she’s done a good job,’ he later added.

Loomer revealed to journalist Tara Palmeri that she wanted to play an old video for the president of Waltz trashing Trump when he first ran for president.

‘It’s something I personally can’t stomach,’ Waltz said in the video, urging viewers to ‘stop Trump now.’