Steve Bannon is trying to make amends.
"Donald Trump, Jr.is both a patriot and a good man", read Bannon's statement, which CNN obtained Sunday from a source close to Bannon.
A new book by journalist Michael Wolff quotes prominent Trump advisers as questioning the president's competence. On Wednesday, Trump shot back with an official statement from the White House claiming that the former chief strategist had little to do with his victorious campaign.
Vanity Fair's Emily Jane Fox wrote that the Trump-Kushners are relishing Bannon's rapid slide into pariah status as his funders desert him and the board at Breitbart.com struggles to decide whether he should be allowed to remain as the company's CEO.
"I regret that my delay in responding to the inaccurate reporting regarding Don Jr. has diverted attention from the president's historical accomplishments in the first year of his presidency", Bannon concluded. Bannon said his support for Trump and his agenda was "unwavering".
Michael Wolff: The sharp tongued author has previously written books on Rupert Murdoch and other big "money guys".
President Reagan also faced questions over his mental health while in office, although some observers saw the comparison as unhelpful given he was later diagnosed with Alzheimer's disease.
Bannon was quoted eviscerating President Donald Trump, his son Donald Trump Jr., his daughter, Ivanka Trump, and his son-in-law Jared Kushner. He gives Trump his regular intelligence briefings.
White House officials and Trump's high-profile supporters have launched an effort to raise doubts about Wolff's credibility. "This is like taking it to a whole new low", she told ABC's "This Week".More news: Barcelona Confident of Signing Coutinho
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"The reality is that the President is a political genius", Mr Miller said while accusing Mr Tapper of being "condescending" and "snide". By the way, did not interview me for three hours, it didn't exist, OK? "Watch the hatred and unfairness of this CNN flunky!"
During a visit to Camp David Saturday, President Donald Trump doubled down on his morning tweets in which he called himself "like, really smart" and "a very stable genius".
You can see Trump's full response in the video above.
Speaking to Fox News, Mr Pompeo said allegations about the U.S. president's lack of competence were "absurd, just pure fantasy".
Chatter about Trump's mental fitness for office has intensified in recent months on cable news shows and among Democrats in Congress. White House spokesman Sarah Sanders said earlier in the week that the book includes "mistake after mistake after mistake".
"Everything I have to say about the ridiculous nature of the Russian "collusion" investigation I said on my 60 Minutes interview. I guess "Sloppy Steve" [Bannon] brought him into the White House quite a bit", Trump said. It didn't exist, OK?
He added that his story "seems to present this presidency in such a way that it says he can't do his job". Reagan announced his diagnosis in a letter to the American people in 1994, more than five years after leaving the White House.
Wolff's book, published Friday, paints Trump as a leader who doesn't understand the weight of his office and spends his evenings eating cheeseburgers in bed, watching television, and talking on the phone to old friends.