During the Vietnam War, Richard Nixon employed an unusual scare tactic in his efforts to reach a withdrawal—he led Vietnam to believe he was crazy enough to start a nuclear war, an approach he described as the madman theory. From his first days in office, President Trump has employed his own madman theory, from menacing North Korea with fire and fury to threatening withdrawal from NATO, leaving not just adversaries, but also U.S. allies and even his own advisors unsure of what he will do next. David Priess spoke with CNN's chief national security correspondent and anchor of CNN Newsroom, Jim Sciutto, who has analyzed Trump's foreign policy through this lens and written "The Madman Theory: Trump Takes On the World." See acast.com/privacy for privacy and opt-out information.