Trump promotes Miller to chief of staff, replacing Wiles

Donald Trump has replaced chief of staff Susie Wiles with Stephen Miller. The change takes effect Monday, after Republicans lost control of Congress in the midterm elections. Wiles submitted her resignation and will move to Trump's political operation. Miller is a longtime Trump loyalist and policy adviser.

Miller served during Trump's first term and became deputy chief of staff after Trump's return to the White House in 2025. Although Wiles formally held the top staff job, Miller already had unusual influence over domestic policy and direct access to Trump. His new position gives him greater authority over White House operations and priorities.

The appointment points toward a more aggressive political and domestic-policy strategy. White House officials said Miller's selection suggests confrontation with a Democratic-led Congress. Trump had also said the White House needed to be "more aggressive" after approval ratings fell near record lows and Democrats regained congressional power.

Republicans lost control of both chambers of Congress in this week's midterm elections. That means Democrats now lead the House of Representatives and the Senate. The shift is especially important because Congress writes laws, controls funding, and can investigate executive-branch conduct.

The article does not name each chamber's new leaders, but it describes the result as a Democratic-led House of Representatives and Senate. Hakeem Jeffries is identified as the top Democrat in the House. Democratic lawmakers have already signaled plans to examine the administration and its officials.

Trump therefore begins this phase of his presidency without unified control of Congress. A Democratic majority can challenge his proposals, demand information, hold hearings, and pursue investigations. The article says an expected wave of congressional investigations is coming, while White House officials expect Miller to steer a more aggressive response to the new political environment.

A White House chief of staff is the president's senior coordinator. The job usually involves managing staff, controlling access to the president, setting priorities, and coordinating policy and political work. That makes the position powerful because it links the president's decisions with the officials expected to carry them out.

Miller already had unusual influence before receiving the title. Since Trump's return in 2025, he served as deputy chief of staff under Susie Wiles, but officials said he wielded outsize influence across much of the domestic agenda. Trump also described him as one of his most trusted advisers. His new role formalizes that access and authority.

The timing makes the change more consequential. Democrats now control Congress, and investigations are expected. White House officials said Miller's selection suggests an aggressive approach to domestic policy and politics. He will help decide how the White House responds to congressional opposition while advancing Trump's agenda.

Stephen Miller is best known for driving Trump's aggressive immigration crackdown. The article presents immigration enforcement as the clearest example of his policy influence. His approach emphasized a very high arrest target and broader enforcement against migrants living in the United States.

The administration set a target of 3,000 arrests a day. To pursue it, federal immigration agents expanded their list of targets. That expansion included migrants who had been living in the United States for decades. The mechanism was straightforward: a numerical enforcement goal encouraged agents to widen whom they considered for arrest.

The policy matters because it reached beyond recent arrivals or newly identified cases. Long-settled migrants were included in the enforcement effort, showing how the target affected the scope of immigration operations. Miller now becomes chief of staff as Trump prepares for conflict with a Democratic-led Congress, so his record suggests domestic policy may remain forceful and confrontational.

Divided government exists when the president's party does not control Congress. Here, Donald Trump is president while Democrats control both the House of Representatives and the Senate. That split matters because the president and congressional majorities may have different priorities and can compete over laws, spending, and administration policy.

Democratic control gives Congress tools to challenge the White House. Democrats can investigate executive officials, demand answers, hold hearings, and make it harder for the administration to advance its agenda without negotiation. The article specifically describes an expected wave of congressional investigations after Republicans lost control.

Trump is signaling resistance rather than retreat. He said the White House needed to be "more aggressive," and officials said Miller's appointment points to an aggressive domestic and political approach. The immediate reality is likely confrontation over policy and oversight. The article identifies the Pentagon, immigration policy, and military leadership changes as areas likely to draw attention.

Congress could investigate several parts of the Trump administration, with the Pentagon as a major focus. Democrats have promised to examine Pete Hegseth's handling of the Defence Department. Congressional aides said the inquiry would include the firing of the chairman of the Joint Chiefs of Staff, among other issues.

Other targets include Hegseth's conduct of the Iran war, his firing of top military officers, and strained relations with politicians. The article says Mr Vance blamed the war's cost for Republican losses, while the administration seeks a $1.5trn defence spending package. Hakeem Jeffries has publicly questioned why Hegseth remains in office.

Hegseth has vowed to fight congressional efforts to impeach him and defended the Iran war as "courageous and historic." Trump has commended him and dismissed questions about firing him. Democratic control of Congress gives lawmakers space to demand documents, question officials, and decide whether conduct warrants further action.

Separation of powers divides federal authority among the executive, legislative, and judicial branches. Congress makes laws and controls public spending, while the executive branch carries out laws. Oversight is one way Congress checks executive power. It lets lawmakers investigate whether officials followed the law, managed agencies properly, or misused their authority.

Congress can hold hearings, request records, question officials, and gather testimony. Committees may investigate matters such as Hegseth's conduct of the Iran war or the firing of senior military leaders. If lawmakers believe an official committed serious wrongdoing, the House can approve articles of impeachment. The Senate then considers the case under its constitutional role.

These powers do not automatically remove an official. They create a formal process for gathering facts and judging accountability. In the article, Democrats' new control of Congress makes investigations into Hegseth and the wider administration more likely. Hegseth's promise to fight impeachment shows that the oversight battle could become a major political confrontation.