Stephen Miller Ascends to White House Chief of Staff: A Look at Trump's Key Architect

White House Deputy Chief of Staff Stephen Miller was seen waving as he walked across the South Lawn of the White House to board Marine One in Washington, DC. United States President Donald Trump has appointed his long-serving adviser Stephen Miller to the position of White House chief of staff. This decision, announced on Friday, signals a reinforcement of Trump’s most contentious policies following the Republican Party's significant losses in the midterm elections earlier this week. With Democrats set to assume control of the US House of Representatives and Senate in January, investigations into Miller’s role within the White House are widely anticipated.

Miller, aged 41, has been a prominent defender of Trump and is recognized as a principal figure behind the president's extensive deportation initiatives. In a statement on Truth Social, Trump described Miller as "one of my most trusted advisors," indicating that he would assume the role from Susie Wiles on Monday. An early supporter, Miller established a reputation as a conservative activist long before aligning with Trump. During his time at Santa Monica High School, he gained experience by vocally opposing what he perceived as liberal school policies on local radio programs. At Duke University, he led the Duke Conservative Union and became a strong proponent for three of the school's lacrosse players who faced rape accusations. Following his graduation, he relocated to Washington, DC, where he served as a legislative aide to Republican members of Congress and Republican Senator Jeff Sessions. He joined Trump’s inaugural presidential campaign in January 2016, where he was credited with shaping the president's communication strategy and distinctive political style. Former Trump adviser Steve Bannon remarked to The Associated Press news agency in 2017, "I think he and Trump hit it off from the very beginning. I think he helped Trump find his voice."

What was his role during Trump’s first term?

After Trump's unexpected victory in the 2016 election, Miller took on the role of presidential adviser and speechwriter. He was an influential voice in formulating Trump's most severe immigration policies, frequently framing these issues as measures to safeguard Western "civilisation." During this period, Democratic lawmakers accused Miller of promoting white nationalist viewpoints. In 2019, the Southern Poverty Law Center published emails that purportedly showed the Trump adviser endorsing white nationalist websites and ideologies. He is recognized for his role in shaping the Department of Justice’s 2018 "Zero Tolerance" policy at the US border, which mandated the arrest of nearly every adult who crossed into the US without legal documentation. This policy led to widespread family separations, as children were prevented from being held in criminal detention facilities with their parents. Trump later modified the policy through an executive order amidst significant public outcry.

As an adviser to Trump, Miller advocated for the termination of Deferred Action for Childhood Arrivals (DACA), a program that provided individuals brought to the US as children without documentation with legal status for education and employment. The program ceased accepting new applications in 2021. Miller was also a driving force behind extensive visa restrictions during Trump’s first term, including a 2017 travel ban affecting several Muslim-majority countries, which became known as the "Muslim travel ban." The initial order prohibited citizens from Syria, Iran, Iraq, Libya, Somalia, Sudan, and Yemen from entering the US for 90 days. An amended version of this policy was eventually upheld by the US Supreme Court. He later became a leading proponent of Trump’s unsubstantiated claims that the 2020 election was fraudulent, supporting efforts for Trump to be declared the winner.

Trump 2.0

Miller remained a close associate of Trump as the former president pursued a political comeback leading up to the 2024 presidential election. He assumed the position of deputy chief of staff for policy and homeland security adviser when the administration returned to office in January 2025. Since then, he has been instrumental in orchestrating Trump's large-scale deportation drive, which has involved immigration enforcement agents deploying across the country, increasingly focusing on individuals with no or only minor criminal records. In May 2025, Miller informed Fox News that the administration had "set a goal of a minimum of 3,000 arrests for ICE every day, and President Trump is going to keep pushing to get that number up higher each and every day."

He has also staunchly defended increasingly aggressive tactics employed by immigration agents. He initially defended the fatal shootings of Renee Good and Alex Pretti by immigration agents in Minneapolis in January. He initially labeled both Good and Pretti as "terrorists" before retracting the statement regarding Pretti. In his return to the White House, Miller also made unsuccessful attempts to end birthright citizenship, while becoming an increasingly vocal supporter of Trump’s military actions in the Western Hemisphere. He endorsed the US apprehension of Venezuelan leader Nicolas Maduro and stated in January on CNN that the US possessed the right to seize Greenland based on its military strength. "We live in a world in which you can talk all you want about international niceties and everything else, but we live in a world, in the real world … that is governed by strength, that is governed by force, that is governed by power," he stated. "These are the iron laws of the world that have existed since the beginning of time."

What does a chief of staff do?

The precise impact of Miller’s new role on his influence with Trump remains unclear. The chief of staff typically oversees White House personnel and hiring, manages the president’s schedule, and advises the president on policy matters. Some individuals within the White House refer to this role, which largely controls the flow of information, as the "gatekeeper" to the presidency.