Journalist Michael Wolff's new bombshell book, "Fire and Fury: Inside the Trump White House", has asserted that many in President Donald Trump's inner circle have questioned his mental fitness, prompting a firm rebuke by the president over the weekend. In a statement published by Axios website, he calls Donald Jr "a patriot and a good man" and says his support for the president is "unwavering".
"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", Mr Bannon said Monday.
British Prime Minister Theresa May has dismissed concerns about Donald Trump's mental fitness, saying the USA president acts in what he sees as the best interests of his country. "If they were stronger, hopefully, you would not have something like that happen", he said.
"I went from VERY successful businessman, to top T.V. Star to President of the United States (on my first try)".
On Sunday, Trump again attacked Wolff and his assertions, invoking former President Ronald Reagan, who battled questions about dementia in the final years of his eight-year term.
Speaking to Fox News, Mr Pompeo said allegations about the U.S. president's lack of competence were "absurd, just pure fantasy".
"Michael Wolff is a total loser who made up stories in order to sell this really boring and untruthful book", Trump tweeted late Friday evening local time.
Wolff said White House staffers he talked to would say things like "we're not at a 25th Amendment level yet".
Donald Trump has defended a series of tweets in which he described himself as a "very stable genius" - by saying he was a "very excellent student".
Chatter about Trump's mental fitness for office has intensified in recent months on cable news shows and among Democrats in Congress. The White House has called the publication "fiction".
Bannon, one time thought to be a mobilizing force within the Trump White House, was quickly condemned earlier this week after it became apparent that he trashed the commander-in-chief to the book's author. "It's in his imagination", Trump said Saturday.
In Fire and Fury, Bannon made disparaging remarks President Trump's daughter, sons, and key campaign advisers.
Reagan died in 2004, at age 93, from pneumonia complicated by the Alzheimer's disease that had progressively clouded his mind.
President Donald Trump steps off Marine One on the South Lawn as he arrives at the White House in Washington, Sunday, Jan. 7, 2018, after traveling from Camp David, Md.