Michael Wolff, the author of “Fire and Fury: Inside the Trump White House,” said he was able to interview people for his controversial book because White House officials were flattered, and also because they were disorganized.

The Trump administration has attacked Wolff for painting an unflattering picture of the president and the White House. But Wolff has said he was allowed to interview several people, and said there was no organized effort to keep him out, even though he had written critically of Trump before.