The Trump administration has removed or reassigned several top career officials in the Justice Department’s national security and criminal divisions, according to multiple people familiar with the matter, who spoke on the condition of anonymity to discuss personnel matters.Two of the people said that at least 15 experienced career staffers across several divisions were removed from their positions and reassigned, a sign that the new president and his aides plan to carry out their promises to dramatically reshape the agency, including to focus more on immigration enforcement.As a way to skirt legal protections afforded to career staffers, many of the...