In another section of the book, Wolff writes that Nunberg struggled to explain the Constitution to Trump.
"It's absolutely outrageous to make these types of accusations and it's simply untrue, and it's sad that people are going and making these desperate attempts to attack the president", White House press secretary Sarah Huckabee Sanders told "Fox & Friends" on Friday.
The spat has only served to heighten demand for the book - with people queuing round the block for a copy.
"I guess Sloppy Steve brought him into the White House quite a bit". The book isn't even in the warehouse yet. "The White House waited 5 hours to issue its statement, so Bannon's team did have enough time to respond". This is a guy who made up a lot of stories to try to sell books.
The Mercer Family recently dumped the leaker known as Sloppy Steve Bannon.
Among other claims, Wolff described Trump's behavior in his book as childlike, and questioned his fitness for office.
Mr Wolff chose to sidestep broader questions about his credibility on Today, claiming that he had written "millions" of words in his career and had never received a correction.
Earlier this week, the White House also said that Trump never sat down with Wolff. The acrimony suggests a permanent split between the president and the strategist who helped him win the White House. "I will quote Steve Bannon: 'He has lost it'".
Whispers quickly began that the fallout might lead to Bannon's ouster from Breitbart.
"The story is a sort of reflection on the crazy state of modern politics".
"I wasn't there to teach the president the Constitution".
Friday's tweets came two days after Trump publicly broke with Bannon after he was quoted in Wolff's book slamming the president's son Donald Trump Jr. and son-in-law Jared Kushner for what he said was a "treasonous" meeting with Russians.
"Where do I send a box of chocolates?"
The President has gone to his Camp David retreat, hoping to steady the ship by concentrating on policy and looming elections in talks with congressional leaders. "I'm here to serve his presidency".
Candice Cohen, who owns the Palm Beach Book Store, said he was gracious to fans who lined up to see him.
Trump's attorney has demanded a halt to publication of the book or excerpts.
"I got as far as the Fourth Amendment before his finger is pulling down on his lip and his eyes are rolling back in his head", Wolff writes of Nunberg's recollection.
On ABC, Jimmy Kimmel mocked the cease-and-desist letter that Trump's lawyer sent to Fire and Fury publisher Henry Holt & Co.