Trump appointed the architect of his anti-immigrant policy as the top man in the White House from November 9, the White House staff will be headed by Stephen Miller, one of the president's close associates and key ideologues of tough measures against illegal immigration. Miller has worked with Trump since the 2016 presidential campaign. He helped develop immigration restrictions, promoted the construction of a wall on the border with Mexico and advocated mass deportation. As chief of staff, Miller will replace Susie Wills, who will join Trump's political establishment. She was diagnosed with breast cancer in March, but continued to work during treatment.