President Donald Trump announced on Truth Social that Stephen Miller will replace Susie Wiles as White House chief of staff — a leadership change arriving as Washington prepares for a newly Democratic Congress, which convenes in early January.

"I am pleased to announce that Mr. Stephen Miller, the current Deputy Chief of Staff of the Trump Administration, and one of my most trusted advisors, will become the Chief of Staff starting Monday, November 9, 2026. Susie Wiles, who has done an outstanding job, will be moving over to the Trump Political Operation. I want to thank her for her service as Chief of Staff — She has done a great job!" Trump wrote in the post, signing it with his name.

Miller is perhaps best known as one of Trump's most influential advisers and a central architect of the administration's restrictive immigration agenda. He currently serves as White House deputy chief of staff for policy and as homeland security adviser in Trump's second administration. Neither position requires Senate confirmation, though both give him substantial influence over federal policymaking and enforcement priorities. The chief of staff post he now inherits carries similar confirmation-free status: it is the senior appointed position in the West Wing, responsible for running White House operations, managing the president's staff, and coordinating the administration's dealings with Congress.

Reporting has described Miller as a driving force behind efforts to increase immigration arrests and deportations, pressing enforcement officials to deliver more aggressive results. His combative style and close relationship with Trump have helped him maintain influence across the agencies responsible for carrying out the administration's agenda.

For Democrats who saw the midterm outcome as an opening for bipartisanship and cooperation with the White House, Miller's promotion is likely to make that considerably more difficult. The chief of staff traditionally serves as the president's principal point of contact with congressional leadership.

The announcement drew immediate reactions on social media.

"There are few officials in the administration more closely associated with the Trump policies/demeanor that led to Tuesday's midterms rebuke. So this is a very instructive move," noted Kyle Cheney, legal affairs reporter for Politico.

"Donald Trump just announced Stephen Miller as his new White House chief of staff. Let that sink in. Days after Republicans suffered massive election losses, Trump's response is to put the architect of his mass deportation agenda in charge of the entire White House operation. The lesson Trump took from Election Day was that Stephen Miller needed MORE power. Absolutely f—— insane," wrote Democratic strategist Adam Parkhomenko.

"I did a big profile of Stephen Miller earlier this year," wrote Sam Friedman on BlueSky. "Called it 'The Most Dangerous Man in America.' This is going to go badly."

"MAGA is in full implosion," said Keith Edwards, a progressive YouTuber.

"Putting Stephen Miller in as chief of staff after the entire election repudiated his attack on Hispanics... and lost the entire state of Texas in the process is peak self-destruction," posted Jen Rubin of The Contrarian.