Jared Kushner sold Trump on the ‘catastrophic mistake’ of firing Comey: Trump biographer
Jared Kushner, Senior Advisor to President Donald J. Trump. (DoD Photo by Navy Petty Officer 2nd Class Dominique A. Pineiro)

Senior White House aide and presidential son-in-law Jared Kushner was the champion behind the firing of James Comey, according to a new biography.

Vicky Ward, author of the recent book Kushner Inc. appeared on MSNBC's "11th Hour" to reveal the excerpt of her extensive report.

"Kushner was exposed by the media as someone who would almost certainly have an increasingly prominent role in the Russian collusion investigation," writes Ward. "Not only had he met with Russian government officials, or connected officials, but he had left those meetings off his security clearance forms. Steve Bannon and others noticed that Kushner became gung ho about firing James Comey."

The author said that she believes it to be the "biggest revelation" in her book, because reports have said that Kushner had supported the decision, but left out many of the details about the president's son-in-law pushing the firing.

"What actually happened is that Jared, as you say, realized that the press had learned that he had had these meetings with a Russian ambassador, a Russian banker connected to the Kremlin, and he had not put them on his security clearance forms," Ward explained. "And very uncharacteristically he made a sort of impassioned argument to the president in front of people."

She explained that Kushner generally corners Trump and talks about things quietly. In this instance, Kusher stood in front of everyone and made the case.

"But this time in front of everyone he said to the president, 'You've got to fire James Comey and here are three why: The FBI doesn't like him, the Democrats don't like him, and the base will love it,'" she recalled. "You know, Steve Bannon, you know, wily strategist, disagreed with him on every single point. But you know, Jared won the day. And to your point, Brian, there lies Trump's catastrophic mistake."

Former Sec. of State Rex Tillerson similarly blamed Kushner for massive mistakes.

Watch the interview below: