An ongoing staffing purge being conducted by White House National Security Adviser H.R. McMaster has thrown the West Wing into chaos, according to more than half a dozen Trump administration insiders who told the Washington Free Beacon that McMaster has been targeting long-time Trump loyalists who were clashing with career government staffers and holdovers from the Obama administration. The purge is part of a larger drama unfolding inside the administration, between veteran Trump staffers committed to the president’s campaign vision of “draining the swamp”‘ in Washington and entrenched bureaucracies seeking to maintain control over policy decision-making, according to these sources,...