Ever since J. Edgar Hoover died, six weeks before the Watergate break-in, the FBI has had to confront presidents. FBI investigations led to President Nixon’s resignation, indictments of President Reagan’s national-security team, and the impeachment of President Clinton. Now the current administration faces a major counterintelligence case. When the FBI confronts the power of the presidency, America must navigate uncharted waters. Tim Weiner, winner of the Pulitzer Prize, the National Book Award, and the Los Angeles Times Book Prize for his work on American intelligence and national security, addresses these looming confrontations and the challenges they pose for American democracy.