Stephen Miller (born August 23, 1985) is an American political advisor serving as the White House deputy chief of staff for policy and the 12th United States homeland security advisor since 2025. A member of the Republican Party, he previously served as a senior advisor for policy and White House director of speechwriting during President Donald Trump's first term. His politics have been described as far-right and anti-immigration. A graduate of Duke University, Miller was involved in conservative causes during his youth, serving as the president of the Duke chapter of Horowitz's Students for Academic Freedom and writing conservative columns for the school newspaper. He pursued a career in politics after his graduation, first working as a press secretary for U.S. representatives Michele Bachmann and John Shadegg. He became the communications director for Senator Jeff Sessions in 2009, who later became the United States attorney general under President Trump. In 2016 he joined Donald Trump's presidential campaign, later joining the first Trump administration as a senior advisor to the president and the White House director of speechwriting. As a speechwriter for Trump, Miller helped write Trump's 2017 inaugural address. He was a key adviser from the early days of Trump's presidency. An immigration hardliner, Miller was a primary author of Trump's travel ban, the administration's reduction of refugees accepted to the United States, and Trump's policy of separating migrant children from their parents. He prevented the publication of internal administration studies that showed that refugees had a net positive effect on government revenues. Miller reportedly played a central role in the resignation in April 2019 of Secretary of Homeland Security Kirstjen Nielsen, who he believed was insufficiently hawkish on immigration. As a White House spokesman, Miller on multiple occasions made false and unsubstantiated claims regarding widespread electoral fraud. Emails leaked in November 2019 showed that Miller had promoted articles from white nationalist publications VDARE and American Renaissance, and had espoused conspiracy theories. Miller is on the Southern Poverty Law Center's list of extremists. After leaving the first Trump administration, he founded the America First Legal Foundation. In November 2024, it was announced that Miller would serve as Trump's deputy chief of staff for policy and homeland security advisor in his second term, taking office on January 20, 2025. He is the youngest person to serve as homeland security advisor and the first millennial to hold the position. In Trump's second term, Miller emerged as one of the most powerful Trump administration officials and a key author of numerous policies.