President Donald Trump announced on Friday that Stephen Miller, his longtime immigration hardliner, will replace Susie Wiles as White House chief of staff starting Monday, November 9, 2026, days after Republicans lost control of Congress in midterm elections.

Wiles submitted her resignation on Thursday night. Sources told Axios the departure was a mutual decision, but driven by Tuesday's election results, for which Trump blamed her. Trump did not ask for her resignation, one informed source said, "but he couldn't get it out of his head that she was to blame, not him." Wiles will move to the Trump Political Operation. In a statement on X, Wiles said serving Trump "has been the honor of a lifetime."

Trump wrote on Truth Social that Miller, the current deputy chief of staff and "one of my most trusted advisors," will become chief of staff. Miller, 41, served in Trump's first administration as speechwriter and policy adviser. He was an architect of Trump's first 100 days and has been working on plans to keep operating a muscular White House even in the face of Democratic majorities. "Trump needs to prepare for war with the Democrats in Congress... and Stephen is a wartime adviser," a Trump adviser explained.

The shake-up follows the Republican Party's resounding midterm defeat, in which Democrats won 247 House seats and 54 Senate seats, gaining control of both chambers.

Democrats criticized the appointment. California Rep. Robert Garcia, incoming chairman of the House Oversight Committee, said Miller's appointment means Trump is "doubling down" on hardline policies voters rejected. Incoming Senate Majority Leader Chuck Schumer wrote on X that Trump "learned nothing from his historic defeat" and "couldn't have made a worse choice."

Some Republicans also questioned the choice. Rep. Don Bacon said Miller's immigration course was responsible for the defeat in Texas, Arizona and Florida. Sen. Thom Tillis called it "the worst of all possible decisions." Rep. Marjorie Taylor Greene warned the shakeup will sink Republican chances in 2028.

Wiles, 69, was Trump's longest-serving chief of staff and the first woman to hold the position. She commanded extraordinary trust from Trump, often serving as the last person he consulted before major decisions. Her influence stemmed from a relationship dating to his 2016 campaign. She was a critical voice against the war in Iran and repeatedly questioned the hardline immigration tactics championed by Miller.

According to The New York Times, Miller urged Trump to wind down the Iran war as part of his bid to become chief of staff, arguing the conflict had alienated Trump's core supporters.

Miller has been instrumental in driving the administration's mass deportation programme. He faced criticism after deadly shootings of Minneapolis protesters by ICE agents in January. In a CNN interview, he said Greenland "belongs" to the U.S. and that he does not believe in a rules-based world order.