President Donald Trump has named Stephen Miller as his new White House chief of staff, replacing Susie Wiles in the biggest shake-up of his second-term team since Republicans were swept from power in Congress. The Stephen Miller chief of staff appointment, announced on Friday, puts the architect of the president’s hardline immigration agenda at the centre of the White House as a new Democratic Congress prepares to take office.

Key Points

• Trump announced on Friday, November 6, 2026, that Stephen Miller will become chief of staff on Monday, November 9, 2026.
• Miller, 41, is deputy chief of staff for policy and homeland security adviser, and has worked for Trump since 2015.
• Susie Wiles, the first woman to hold the job, moves to Trump’s political operation after leading the West Wing since January 2025.
• The shake-up comes three days after Democrats won the House and Senate in the November 3 midterm elections.
• No replacement has been named for Miller’s policy and homeland security roles.

What Happened

Trump announced the change on Truth Social on Friday, calling Miller “one of my most trusted advisors”. The announcement gave no reason for the change and did not spell out Wiles’s new responsibilities in the president’s political operation. Wiles confirmed the move in a statement on X, saying Friday was her last day as chief of staff, while Trump thanked her publicly, saying she “has done an outstanding job”.

It is a promotion for Miller, deputy chief of staff for policy and homeland security adviser, who drove the immigration enforcement campaign and mass-deportation programme that defined Trump’s second term.

Background: Wiles, the First Woman in the Job

Wiles was the first woman ever to hold the job and was widely seen as one of the most disciplined managers of Trump’s career. She ran his 2024 campaign, then led a West Wing notably free of the leaks and infighting that marked his first term.

Her departure follows intense pressure on Trump to dismiss her after the midterm defeat, when Democrats won both chambers in a rout party figures call one of the worst for a governing party in decades. Vice President JD Vance blamed the war in Iran; Senator Ted Cruz pointed to tariffs and the cost of living. Moving to Trump’s political operation keeps Wiles inside his circle, but removes her from running the White House at its hardest moment, with a hostile Congress to be sworn in on January 3, 2027.

Stephen Miller Chief of Staff: A Hardline Operator Takes the Helm

Miller’s promotion puts one of the most controversial figures in American politics in the job that controls the flow of people, paper and decisions into the Oval Office. As gatekeeper, his appointment signals that Trump will govern his final two years through the adviser who shaped his toughest policies.

Miller, 41, has worked for Trump since his first campaign began in 2015, longer than almost any other senior aide. A speechwriter and policy adviser in the first term, he returned as deputy chief of staff for policy and homeland security adviser, designing and driving the immigration crackdown. That record has made him a hero to Trump’s base and a lightning rod for critics.

The Wall Street Journal reported this week that Trump told aides Miller had “gone too far” on deportations after First Lady Melania Trump complained that people she knew were being apprehended. Days later, the president has elevated the same aide to the most powerful staff job in the White House. No replacement has been named for Miller’s old portfolios, and the White House has not said whether he will keep a hand in immigration policy from his new post.

Reactions: Praise From Trump, Silence on the Reason

Trump’s announcement was warm toward both figures, but neither he nor the White House explained why the change was made now, or what Wiles will do next. The lack of detail has fuelled speculation that the move was forced by the midterm fallout.

Democrats, who take both chambers in January, have offered little public reaction so far. But Miller’s elevation is certain to feature in coming oversight battles, with the new Congress expected to investigate immigration enforcement, the war in Iran and other areas where Miller has been central.

Why It Matters

The chief of staff is the most powerful unelected job in American government, and choosing Miller says much about Trump’s final two years. Rather than a conciliator to work with a Democratic Congress, the president picked the adviser most identified with confrontation and the policies many Republicans blame for the midterm rout.

It also matters because the next Congress will investigate the White House from January 3. The chief of staff sits at the centre of every decision on subpoenas, hearings and inquiries, and Miller’s combative style is likely to shape a White House that fights rather than cooperates. For Wiles, the move ends a historic tenure: as the first woman in the job, she brought order to a White House long defined by chaos, and her departure removes one of the few senior figures seen as a moderating influence on the president.

What Happens Next

Miller takes over on Monday, November 9, with little time to settle in. The lame-duck session will test the White House at once, with funding deadlines, the war in Iran and the midterm fallout all demanding decisions. The first test is staffing: who replaces him as homeland security adviser, and whether more departures follow Wiles.

Longer term, the appointment sets the tone for two years of divided government. With Democrats holding both chambers and investigations expected from January, the White House under Miller is likely to be more defiant and more closely tied to the immigration agenda that defined Trump’s second term.

Frequently Asked Questions

Who is the new White House chief of staff?
Stephen Miller, 41, currently deputy chief of staff for policy and homeland security adviser. Trump announced on Friday, November 6, 2026, that Miller takes over on Monday, November 9, 2026.

Why is Susie Wiles leaving the role?
The White House has given no reason. Wiles, the first woman in the job, moves to Trump’s political operation after pressure on Trump to dismiss her following the historic midterm losses on November 3.

What is Stephen Miller known for?
Miller is the architect of Trump’s hardline immigration agenda, including the mass-deportation programme. He has worked for Trump since 2015 and served as deputy chief of staff for policy in the second term.

When does Miller start?
Miller starts on Monday, November 9, 2026; Wiles said Friday, November 6, was her last day.

What does this mean for the new Democratic Congress?
Democrats take both chambers on January 3, 2027, and are expected to investigate the administration. Miller’s appointment suggests a confrontational White House response.

Read more: Trump Told Aides Stephen Miller Had Gone Too Far on Deportations, WSJ Reports • Trump Says Iran War Was a Piece of Republican Midterm Losses • White House Insists Trump Is Still Your President After Midterm Rout