The president’s lawyers largely ignored Mr. Bolton’s book, saying the investigations of political rivals that Mr. Trump encouraged Ukraine to pursue were an effort to root out corruption and not tied to U.S. aid.

What’s next: A 16-hour question-and-answer session begins once Mr. Trump’s team concludes. The Senate will also vote this week on whether to call witnesses.

Go deeper: In his book, Mr. Bolton says that he and Attorney General William Barr were concerned by Mr. Trump’s seeming embrace of authoritarian leaders, including those of China and Turkey.

The Daily: Today’s episode is about Mr. Bolton’s revelations.

Another angle: “Hamilton” fans might recognize the title of Mr. Bolton’s memoir, “The Room Where It Happened,” which is nearly the same as a song title from the Broadway hit.