Mr. Trump's Wild Ride: The Thrills, Chills, Screams, and Occasional Blackouts of an Extraordinary Presidency

Major Garrett has been reporting on the White House for nearly two decades, covering four different presidencies for three news outlets. But if he thought that his distinguished journalistic career had prepared him for the unique challenges of covering Donald Trump, he was in for a surprise.

Like many others in Washington, Garrett found himself having to unlearn many of his own settled notions about the nature and function of the presidency. He also had to separate the carnival-like noise o...