Stephen Miller Takes Over as White House Chief of Staff as Susie Wiles Steps Aside

Stephen Miller, one of Donald Trump's longest-serving and most loyal aides, takes over as White House chief of staff on Monday, replacing Susie Wiles, who had run the West Wing since the first day of Trump's second term. It is the most significant change to the president's team since Republicans lost both chambers of Congress in the November 3 midterm elections.

How the change happened

Trump announced the move on Friday on Truth Social. According to CBS News, he called Miller "one of my most trusted advisors" and said Wiles would move over to the "Trump Political Operation," adding: "She has done a great job!" Speaking to reporters, the president explained simply: "I wanted to make a change."

CBS News and NPR reported that Wiles submitted her resignation on Thursday night. Three sources told CBS the decision was tied to the Republican losses. She had planned to stay through the lame-duck session of Congress, likely leaving around the end of the year, but Trump accelerated the timeline. In a post on X, Wiles listed border security, tax cuts, the economy and "America First" among the administration's accomplishments and said her commitment to the president would continue.

Wiles managed Trump's 2024 campaign and became the first woman to serve as White House chief of staff. CBS News reported it was unclear whether her deputies would remain at the White House.

Who is Stephen Miller

Miller has worked alongside Trump since his first presidential campaign. Before the promotion he served as deputy chief of staff for policy and homeland security adviser. Key points about the new chief of staff:

• he is widely seen as the architect of the administration's immigration enforcement and deportation program;
• Fox News reports he helped identify actions Trump can take by executive order on immigration, tariffs and federal spending, without going through Congress;
• Trump describes him as "very good politically" and a "great manager";
• Miller praised "the incomparable Susie Wiles" and said the mission of supporting the president was "more clear than ever."

Democrats push back

Democrats, who will control both chambers from January, reacted sharply. Senate Democratic leader Chuck Schumer said Trump had "learned nothing from his historic defeat" and called Miller the architect of "the most barbaric, inhumane policies." House Democratic leader Hakeem Jeffries labeled him a "dangerous xenophobe and reckless extremist."

Rep. Robert Garcia, expected to chair the House Oversight Committee, said Miller "should lawyer up" and pledged that Oversight Democrats would investigate him. The criticism was not only partisan: Republican Sen. Thom Tillis called Miller "the worst of all possible choices" for the job in an interview with CNN. Tillis had already urged Trump in March to remove Miller, describing him as a "big problem" for the administration, and he argued after the election that Republicans had lost control of the narrative on the border.

Why it matters

The chief of staff is one of the most powerful jobs in Washington, controlling access to the president, coordinating the executive branch and serving as a key channel to Congress. CBS News notes that elevating Miller signals Trump is doubling down on his governing approach even after voters rejected his party's agenda at the ballot box.

Trump has said he can work with the incoming Democratic leadership, but installing one of his most combative aides suggests a more confrontational relationship with Capitol Hill. For America's partners, including Ukraine, the tone of that relationship will shape budget decisions and the predictability of U.S. policy through 2027 and 2028.