There will not be a book published this fall more urgent, important, or controversial than The Dangerous Case of Donald Trump, the work of 27 psychiatrists, psychologists and mental health experts to assess President Trump’s mental health. They had come together last March at a conference at Yale University to wrestle with two questions. One was on countless minds across the country: “What’s wrong with him?” The second was directed to their own code of ethics: “Does Professional Responsibility Include a Duty to Warn” if they conclude the president to be dangerously unfit?

The Twenty-fifth Amendment (Amendment XXV) to the United States Constitution deals with succession to the Presidency and establishes procedures both for filling a vacancy in the office of the Vice President as well as responding to Presidential disabilities. It supersedes the ambiguous wording of Article II, Section 1, Clause 6 of the Constitution, which does not expressly state whether the Vice President becomes the President or Acting President if the President dies, resigns, is removed from office, or is otherwise unable to discharge the powers of the presidency. The Twenty-fifth Amendment was adopted on February 10, 1967.