Since the election of President Donald Trump, the Twenty-Fifth Amendment to the Constitution-covering presidential incapacity-has been a frequent topic of public discussion. Meanwhile, Section 4 has become a mainstay in television dramas, which usually represents it inaccurately. The country needs this complicated but essential topic explained.Unable: The Law, Politics, and Limits of Section 4 of the Twenty-Fifth Amendment is designed to educate and inform the public about Section 4 in an evenhanded and accessible way. This book is not about President Trump; it offers no opinions on his fitness for office. By the end of the book, though, it will be clear how Section 4 applies to him, as well as to any other president.