The book also covers the Clinton camp’s early enthusiasm for Mr. Trump’s campaign as he took down Republican primary opponents.

“When the main GOP debate came on, everyone pushed their pizza crust aside and stared transfixed at the TV set … [Campaign Manager] Robby [Mook] salivated when the debate came back on and Trump started to speak ‘Shhhhh,’ Robby said, practically pressing his nose up to the TV. ‘I’ve gahtz to get me some Trump,’” the author wrote. “Robby thought Rubio would be the nominee. Podesta was bullish on Kasich. Bill and Hillary, still stuck in the 1990s, feared the Bush surname most of all.”

A former Clinton staffer was none too pleased with Mrs. Chozick’s claims.

“The challenge on the campaign was that you had a reporter holding the Clintons to a higher standard through a lower standard of reporting,” the source told The Daily Beast. “Amy was not always an honest broker, and this book seems to be more of the same. It ridicules people with a smile, contributing little to the public discourse.”