Kellyanne Conway is reportedly the White House's "number one leaker." Author of The Trump White House: Changing the Rules of the Game Ronald Kessler told CNN that Conway, counselor to President Trump and his former campaign manager, leaks more information to the media than anyone else who works at the White House.

Kessler did not provide specific examples of what Conway has leaked to CNN's Jake Tapper on State of the Union, but he did say that she has uttered some of the most "mean, cutting, and honestly untrue" things about former chief of staff Reince Priebus. He also said Ivanka Trump and Jared Kushner are not always on Conway's good side and she has "dissed" them in the past. According to Kessler, Trump is aware that his daughter, who serves as his senior advisor, and his son-in-law are "problems."

"In the end, Jared and Ivanka would push the most disastrous and foolish decisions of Trump's presidency," Kessler writes in his book, "they had no understanding of the basic fundamentals of how government works, how a campaign works, how politics works. Most of all, they had no understanding of the political consequences of their actions."

"So if you wonder why there are so many leaks out of the White House, one reason is Kellyanne Conway is the number one leaker," said Kessler. The White House has not yet responded to CNN's request for comment.

The author promises other "juicy tidbits" of White House gossip in the book, including the "disastrous" firing of James Comey, which he claims was pushed by Ivanka and Kushner, and "the most absurd hire in the history of the White House," Anthony Scaramucci.

The Trump White House: Changing the Rules of the Game will be released April 3.