Stephen Miller is an American political strategist and former senior advisor to President Donald Trump, best known for his role in shaping the administration’s hardline immigration policies. A vocal conservative since his college days at Duke University, Miller worked for several Republican lawmakers before becoming a key figure in Trump's 2016 campaign and subsequent presidency. He was instrumental in drafting policies like the travel ban and family separation at the U.S.-Mexico border, earning both praise and criticism for his staunch nationalist stance. After leaving the White House, he founded America First Legal, continuing to influence U.S. policy through legal challenges.