Mike Waltz is ninth major swap in President Trump's top team so far
President Donald Trump's removal of Mike Waltz as national security adviser this week is the latest shakeup for an administration that just hit its 100th-day mark.
Video above: Trump stands by top officials amid leaked messages scandal
Waltz, who served as national security adviser until Thursday, is now the United Nations ambassador nominee. Secretary of State Marco Rubio will fill in as acting national security adviser, Trump said.
The move comes weeks after Waltz added a journalist to a Signal chat that was used to discuss military strikes.
The UN Ambassador nominee was vacant after Trump withdrew Rep. Elise Stefanik's nomination in late March. The withdrawal will keep Stefanik in the House, where Republicans hold a slim majority.
The UN ambassador role does require Senate confirmation.
Other changes Trump has made to his top administration team include swapping former Florida congressman Dave Weldon out for Susan Monarez to lead the Centers for Disease Control and Prevention. Monarez has yet to be confirmed by the Senate.
Vivek Ramaswamy, who was first tapped as the Department of Government Efficiency's co-director alongside Elon Musk, left his role to begin a campaign for Ohio's governor seat. The Ohio gubernatorial election will be held Nov. 3, 2026.
The first big change for Trump's second administration came before he was even inaugurated. Matt Gaetz, Trump's original pick for attorney general, withdrew from the nomination after coming under fire for allegations of sexual misconduct.
Pam Bondi, former attorney general of Florida, now holds the role.
See all of the changes in top roles for the Trump administration below, along with the most notable positions and names that Trump has called up for his second administration.
