What Stephen Miller has pushed for while in Trump administration

Top Trump adviser Stephen Miller, who is set to take over the White House chief of staff role on Monday, has driven President Trump Washington — Top Trump adviser Stephen Miller, who is set to take over the White House chief of staff role on Monday, has driven President Trump's most controversial immigration policies during both of his administrations. Mr. Trump announced the staffing shake-up on Friday, calling Miller one of his "most trusted" advisers. Miller replaces Susie Wiles, who has been his chief of staff throughout his second term. The move comes after Republicans suffered crippling losses in the midterm elections and as Democrats plan sweeping investigations into the administration's actions, including its immigration enforcement policies.

Miller was the architect behind many of those policies and also championed the administration's immigration enforcement expansion, which has been supported by approximately $170 billion that congressional Republicans allocated for immigration enforcement and border security in the One Big Beautiful Bill Act, which became law in July 2025. During Mr. Trump's first term, Miller helped develop and publicly defend the administration's executive order that restricted entry by nationals of several Muslim-majority countries. The travel ban led to protests around the U.S. and legal challenges. A third iteration of the ban was upheld by the Supreme Court in 2018. He was a leading supporter