Former President Donald Trump's son-in-law and close adviser Jared Kushner got into "knock-down, drag-out screaming matches" with Trump over the 2020 presidential election and Trump's unsubstantiated claims of voter fraud, a new book claims. 

In "The Fight of His Life: Inside Joe Biden's White House," New York Times bestselling author Chris Whipple recounts how Kushner fought with Trump in the aftermath of the election. He did not believe his father-in-law's claims about a stolen election, and he had left Washington, D.C., for the Middle East to work on the Abraham Accords, a historic peace agreement negotiated by the Trump administration. 

"With all due respect, I’m not going to like what you’re doing, and you’re going to be screaming at me," Kushner had told the president, according to Whipple. 

Whipple's book reports that Kushner and his wife, Trump's daughter Ivanka, believed the former president would eventually accept the election results. He thought the lawyers advising Trump to contest the election, Rudy Giuliani and Sidney Powell, were "clowns," and referred to them as "the Crazy Show." 

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FILE - In this July 25, 2017 file photo, White House Senior Adviser and envoy, Jared Kushner, listens at right as President Donald Trump speaks during a meeting with Lebanese Prime Minister Saad Hariri in the Cabinet Room of the White House in Washington. Kushner began a round of talks with Israeli and Palestinian leaders as he resumed efforts to restart peace talks. Kushner, who is President Donald Trump's son-in-law, met with Israeli Prime Minister Benjamin Netanyahu in Jerusalem on Thursday, Aug. 24, 2017, before heading to the West Bank city of Ramallah to meet Palestinian President Mahmoud Abbas in the evening. (AP Photo/Pablo Martinez Monsivais, File)

White House senior adviser Jared Kushner listens as President Donald Trump speaks during a meeting with Lebanese Prime Minister Saad Hariri at the White House on July 25, 2017. (AP Photo/Pablo Martinez Monsivais, File)

Chris Whipple's 2022 book

White House chief of staff Ron Klain's comments were recorded in the forthcoming book "The Fight of His Life: Inside Joe Biden's White House" by author Chris Whipple. (Scribner/Simon & Schuster)

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"Look, when you're out of here, a lot of people will scatter," Kushner reportedly yelled at Trump during one of their heated arguments. "I'm with you until you hit the dirt — so you may want to listen to what I'm saying!"

He told Trump that Giuliani and Powell were taking him on a "funky ride." 

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U.S. President Joe Biden, right, greets Ron Klain, White House chief of staff, while arriving to a meeting in the Eisenhower Executive Office Building in Washington, D.C., U.S., on Wednesday, June 30, 2021

President Biden, right, greets Ron Klain, White House chief of staff, while arriving to a meeting in the Eisenhower Executive Office Building in Washington, D.C., on June 30, 2021. (Sarah Silbiger/UPI/Bloomberg via Getty Images)

"The Fight of His Life" was released Tuesday. With access to key players in the Biden administration, including chief of staff Ron Klain, Secretary of State Antony Blinken, and CIA Director William Burns, Whipple offers a behind-the-scenes look at how the Biden White House operates, often with surprising revelations.

The book details Biden's squabbling with Vice President Kamala Harris, who he reportedly called a "work in progress," as well as his distrust of some Secret Service agents, many of whom he believes to be "white ex-cops from the South who tend to be deeply conservative," according to Whipple. 

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It also paints a complex picture of Trump, who reportedly wrote a "shockingly gracious" letter to Biden before leaving the White House. Kushner told Whipple that Trump had spent three days composing it, all the while publicly claiming the election was stolen. 

"It just shows he's got many different layers," Kushner said.