President Trump replaced White House Chief of Staff Susie Wales with Stephen Miller following the Republicans' heavy midterm losses because he says Miller is the only adviser who is "getting things done," according to The Atlantic.
Unlike Wills, who has sought to rein in Trump's more aggressive decisions, Miller prefers a confrontational approach, including supporting efforts to compel journalists to reveal government sources.
One source said Trump wanted someone to "crack skulls" ahead of two years of expected political battles with Democrats.