A top official of the National Security Council was fired last month after arguing in a memo that President Trump is under sustained attack from subversive forces both within and outside the government who are deploying Maoist tactics to defeat President Trump’s nationalist agenda. His dismissal marks the latest victory by National Security Adviser H.R. McMaster in the ongoing war within Trump’s White House between those who believe that the president is under threat from dark forces plotting to undermine him, and those like McMaster who dismiss this as conspiratorial thinking. Rich Higgins, a former Pentagon official who served in...