President Trump dismissed his chief of staff, prompting a reshuffle in the White House. Beginning Monday, Stephen Miller, who had previously served as a deputy, will take over the role previously held by Susie Wiles. The change marks Miller’s elevation to the top staff position. In the Justice Department, two senior officials announced their resignations. Their departures add to the wave of turnover within key components of the administration. The moves were reported as part of a broader reorganization effort by the president. No further details on the reasons for the dismissals were provided.