Story highlights The book, "Fire and Fury: Inside the Trump White House" by Michael Wolff, is based on hundreds of interviews

Bannon also reportedly told Wolff: "They're going to crack Don Junior like an egg on national TV"

(CNN) Former White House chief strategist Steve Bannon called the 2016 Trump Tower meeting between Trump campaign officials and a Russian lawyer purportedly offering damaging information about Hillary Clinton "treasonous," according to a new book obtained by The Guardian.

The book, "Fire and Fury: Inside the Trump White House" by Michael Wolff, is based on hundreds of interviews, including ones with President Donald Trump and his inner circle. According to the Guardian, Bannon addressed the June 2016 Trump Tower meeting between Donald Trump Jr., then-campaign chairman Paul Manafort, Jared Kushner and Russian operatives that was arranged when Trump Jr. agreed to meet a "Russian government attorney" after receiving an email offering him "very high level and sensitive information" that would "incriminate" Clinton.

"The three senior guys in the campaign thought it was a good idea to meet with a foreign government inside Trump Tower in the conference room on the 25th floor -- with no lawyers. They didn't have any lawyers," Bannon continued, according to the Guardian. "Even if you thought that this was not treasonous, or unpatriotic, or bad s***, and I happen to think it's all of that, you should have called the FBI immediately."

Bannon also reportedly told Wolff: "They're going to crack Don Junior like an egg on national TV."

An attorney for Trump Jr. declined to comment. But the President unloaded on Bannon in a statement early Wednesday afternoon.

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