President Donald Trump denounced his former top strategist, Steve Bannon, on Wednesday, saying that he “lost his mind” after leaving the White House last summer.

“When he was fired, he not only lost his job, he lost his mind,” Trump said of Bannon in a statement the White House issued. “Now that he is on his own, Steve is learning that winning isn’t as easy as I make it look.”

The statement represented an emphatic break from the person considered the architect of Trump’s presidential campaign. Bannon continued to enjoy access to the president after he left the White House, but that has ended, one person familiar with the matter said.

Earlier on Wednesday, New York Magazine published excerpts of a forthcoming book by author Michael Wolff in which Bannon criticizes Trump’s campaign as well as the president and his family. The Guardian published excerpts of the book in which Bannon predicts that Special Counsel Robert Mueller will “crack Don Junior like an egg on national TV” over the president’s son’s meeting with a Russian lawyer at Trump Tower in June 2016.

Bannon also called Donald Trump Jr.’s meeting with the lawyer, in which he expected to receive damaging information on Trump’s election opponent Hillary Clinton, “treasonous” and “unpatriotic,” according to the Guardian.

Bannon, reached by Bloomberg News, declined to comment on the remarks published by the Guardian.

In his 265-word statement, Trump went on to indict Bannon for some of his activities at the White House and afterward. He blamed him for the loss of a Republican Senate seat in Alabama in a special election last month and accused him of leaking to news reporters while he served as the White House chief strategist.

“Steve had very little to do with our historic victory, which was delivered by the forgotten men and women of this country,” Trump said. “Yet Steve had everything to do with the loss of a Senate seat in Alabama held for more than thirty years by Republicans. Steve doesn’t represent my base — he’s only in it for himself.”

Bannon backed former state Supreme Court Chief Justice Roy Moore over Trump’s preferred candidate, incumbent Sen. Luther Strange, in a primary election for the Alabama seat. Moore lost to Democrat Doug Jones in the special election after several women accused him of sexual misconduct while they were teenagers.

“Steve pretends to be at war with the media, which he calls the opposition party, yet he spent his time at the White House leaking false information to the media to make himself seem far more important than he was,” Trump said. “It is the only thing he does well. Steve was rarely in a one-on-one meeting with me and only pretends to have had influence to fool a few people with no access and no clue, whom he helped write phony books.”

In addition to Wolff’s book, titled “Fire and Fury: Inside Trump’s White House,” Bannon was the subject of a best-selling book published last year by Bloomberg Businessweek writer Joshua Green, “Devil’s Bargain: Steve Bannon, Donald Trump, and the Storming of the Presidency.”

Wolff, who New York Magazine said conducted more than 200 interviews for his book including with the president and most of his senior staff, also reported that Trump never expected to win the election and had promised his wife, Melania, that he wouldn’t be president. She “was in tears — and not of joy” on election night as it became clear Trump would beat Clinton, Wolff reported.

“The book is clearly going to be sold in the bargain fiction section,” Melania Trump’s spokesman, Stephanie Grisham, said in a statement. “Mrs. Trump supported her husband’s decision to run for president and in fact, encouraged him to do so. She was confident he would win and was very happy when he did.”

Wolff reported that friends Trump phoned at night after leaving the Oval Office for the day would leak details of the conversations to reporters and that many of them consider him ignorant. Rupert Murdoch, co-chairman of Twenty-First Century Fox and a close Trump confidante, called him an “idiot” — preceded by an expletive — after one such call, Wolff wrote.

Trump’s longtime friend Thomas Barrack called the president “not only crazy” but “stupid,” Wolff reported. Barrack denied making the comments on Wednesday.

Wolff portrays Trump’s top three advisers at the beginning of his presidency — Bannon, senior adviser and son-in-law Jared Kushner, and former chief of staff Reince Priebus — as consumed by infighting and frequently unable to coordinate strategy.

He wrote that a former deputy chief of staff who also left last year, Katie Walsh, was frustrated by the chaos of Trump’s White House and by the president himself, and quoted her saying that working for him was “like trying to figure out what a child wants.”

Other revelations may prove more damaging to the White House in the long-term. Michael Flynn, the president’s former national security adviser, allegedly justified a pre-election speaking engagement paid for by Russians by saying it would only present a conflict of interest “if we won.”

“This book is filled with false and misleading accounts from individuals who have no access or influence with the White House,” White House Press Secretary Sarah Huckabee Sanders said in a statement. “Participating in a book that can only be described as trashy tabloid fiction exposes their sad desperate attempts at relevancy.”

Bloomberg’s Justin Sink contributed.