President Trump Announces Stephen Miller as New White House Chief of Staff President Donald Trump announced Friday that Stephen Miller, currently his deputy chief of staff and one of his most trusted advisers, will become White House chief of staff effective Monday, November 9, 2026. Susie Wills, who served as chief of staff, will move to Trump's political operation. Trump thanked her for her service, declaring that she had done an "outstanding job." Wills confirmed in a statement that today is her last day in office, describing her service as the "honor of her life" while affirming her continued commitment to the president and the administration's agenda.