Trump’s approach to crisis management continues to be guided by the Roy Cohn playbook. “This is McCarthyism!” Trump said, as he attacked Obama for supposedly wiretapping him, on Saturday. There was great irony to this. Cohn, after all, was Joe McCarthy’s chief counsel on the Senate Permanent Subcommittee on Investigations during the early 1950s. Two decades later, he became one of Trump’s biggest mentors during a formative phase of his life.