The New York Times profiles Stephen Miller after President Trump fired Susie Wiles as chief of staff and replaced her with him, a move Trump explained only by calling Miller one of his most trusted advisers. Chris Cameron writes that Miller, who for nearly a decade has driven Trump's most aggressive policies — family separation, the 2017 Muslim travel ban, mass deportations, and purges of disloyal officials — now holds pre-eminent power in Trump's inner circle.