Stephen Miller took over as White House chief of staff on November 9, putting President Donald Trump’s hard-line immigration strategist at the center of an administration facing a Democratic-controlled Congress.
How Miller reached the role
Trump announced the change Friday, November 6, and Miller took over Monday, November 9, after Democrats won both chambers. Trump praised Miller as a trusted adviser and manager and said Susie Wiles would move to his political operation. CBS News reported Wiles resigned Thursday, with three sources linking the decision to election losses; Trump told the Associated Press the change was not because of the election. Wiles had reportedly expected to stay longer, leaving who initiated her departure unclear.
Miller joined Trump’s 2016 campaign as a speechwriter, became a leading immigration voice in the first administration, and later served as deputy chief of staff for policy and homeland security adviser. In Trump’s second term, he helped drive deportation and enforcement. The chief of staff title brings no new legal powers, but puts him in charge of coordinating White House work and close to the president’s decisions.
Preparing to govern without Congress
Before the election, Reuters reported that Miller, budget director Russell Vought and White House lawyers identified executive actions Trump could take without Congress on immigration, tariffs, housing and federal spending. Democrats take control in January, but agencies can use powers that existing laws delegate to the executive branch. Republicans also allocated about $170 billion for immigration enforcement and border security in a 2025 law.
Democrats can investigate agencies, seek documents, hold hearings and shape future spending, but Trump can veto bills and current funding leaves room for enforcement. Oversight is more likely to expose decisions and raise their political or administrative cost than to stop operations at once. The incoming majority has signaled plans to scrutinize ICE and the Department of Homeland Security, including enforcement conduct and funding.
Where the next fight may move
Executive directives must have legal authority and can face court challenges. Miller’s work on Trump’s travel restrictions brought years of legal challenges; the Supreme Court ultimately upheld a later version. His advocacy for deportations under the Alien Enemies Act has raised due-process disputes. The stakes include people facing detention or removal and agencies defending policies in court and before Congress. An AP survey of more than 100,000 midterm voters found about six in ten thought immigration enforcement had gone too far.
The next phase is likely to involve executive decisions, lawsuits, oversight and future funding, not a quick legislative settlement. Miller’s promotion suggests Trump is relying on a trusted policy enforcer, not retreating, but that is an interpretation, not a stated policy change. Watch what immigration actions the White House advances, how courts respond and when congressional committees demand DHS records.