Stephen Miller takes over as White House chief of staff on Monday, and for anyone who has followed Trump’s immigration agenda, the name needs no introduction. Miller has been the driving force behind nearly every hardline immigration policy of both Trump administrations, and now he holds the most powerful staff job in the building. The chief of staff controls who gets in front of Trump, what reaches his desk, and how the entire White House operates day to day. Here is who Stephen Miller is and what he has done.
Miller is 41 and grew up in Santa Monica, California. He made a name for himself early as a conservative provocateur in high school and later at Duke University, then worked for Republican Representative Michele Bachmann and Senator Jeff Sessions, one of the most anti immigration voices in Congress at the time. He joined Trump’s 2016 campaign as a speechwriter and senior adviser and has been at Trump’s side ever since.
In Trump’s first term, Miller was the architect of the policies that defined the administration. The travel ban that blocked people from several Muslim majority countries from entering the United States came from his playbook in the first week. So did the “zero tolerance” policy of 2018, which prosecuted every adult caught crossing the border illegally. Because parents were sent to criminal custody, thousands of children were taken from their families and held separately, some of them toddlers. Many families were not reunited for years, and some children have never been matched with their parents. Miller also pushed to slash the number of refugees the country accepted to historic lows and championed Title 42, a public health rule used during COVID to turn away asylum seekers at the border without a hearing.
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In 2019, the Southern Poverty Law Center published hundreds of emails Miller had sent to Breitbart News before he joined the White House. In them, he promoted articles from white nationalist websites and recommended “The Camp of the Saints,” a French novel that portrays immigrants as invaders destroying white civilization. Miller has never apologized for the emails.
After Trump left office in 2021, Miller founded America First Legal, a group he pitched as a conservative answer to the ACLU. During the 2022 midterms, the group spent millions on radio ads, mailers and commercials claiming white Americans were victims of racism. One radio spot opened by asking when racism against white people became okay, and accused Joe Biden of putting white people last in line for COVID relief. The NAACP called on Georgia radio stations to pull the ad. Mailers sent in New Jersey and other states claimed Democrats were giving unfair advantages to Black and Latino people while shutting out white and Asian Americans.
America First Legal did not stop at ads. It filed a complaint asking a federal agency to investigate Kellogg’s for discriminating against white men, went after corporate diversity programs, and represented white farmers who sued to block a debt relief program meant for farmers of color who had faced decades of discrimination by the federal government. Miller and his group describe all of this as fighting for equal treatment under the law.
When Trump returned to office in 2025, Miller came back as deputy chief of staff for policy and head of the Homeland Security Council, the body that coordinates immigration and domestic security across the government. In May 2025, he met with ICE leadership and set a goal of at least 3,000 immigration arrests a day, roughly triple what the agency was doing. He reportedly threatened to fire field office leaders who fell behind and told agents to go after anyone without legal status, not just people with criminal records. The Justice Department later denied in court filings that any arrest quota exists. To put the number in perspective, ICE has about 6,000 deportation officers. The NYPD has around 36,000 officers and makes about 700 arrests a day.
That push sent masked agents into workplaces, courthouses and neighborhoods across the country, including a raid on a Hyundai battery plant in Georgia. The administration used the Alien Enemies Act, a 1798 wartime law, to ship Venezuelan men to a mega prison in El Salvador, many without a court hearing. Miller said the White House was “actively looking at” suspending habeas corpus, the constitutional right to challenge your detention in front of a judge. He has also pushed to end birthright citizenship, the guarantee in the 14th Amendment that anyone born in the United States is a citizen. National Guard troops were sent into Los Angeles, Washington, Chicago and other cities run by Democrats. Miller has called the Democratic Party a domestic extremist organization.
The cost has been human. By April 2026, ICE counted 48 people who had died in its detention since Trump took office, 17 of them that year alone.
Then came Minneapolis. In January 2026, during an enforcement operation known as Operation Metro Surge, an ICE officer shot and killed Renee Good, a 37 year old mother of three, as she sat in her SUV. Two weeks later, Border Patrol agents shot and killed Alex Pretti, a 37 year old ICU nurse at the Minneapolis VA hospital who had been filming agents with his phone. Both were American citizens. Within hours of Pretti’s death, Miller called him a “domestic terrorist” and a “would be assassin,” offering no evidence. Video of the shooting contradicted the administration’s account, and even the deputy attorney general refused to back the label. Days later, Miller conceded that agents “may not have been following” protocol. Renee Good’s family has since sued the federal government and named Miller personally as a defendant.
Trump has called Miller one of his most trusted advisers, and the promotion comes right after Republicans lost the midterms. Rather than moving toward the center, Trump handed the keys to the man most responsible for the policies voters pushed back on. Miller now decides who sees Trump, which ideas move forward, and how every agency in the executive branch carries out the agenda.
