In August 2016, Bannon was appointed as chief executive of then-candidate Trump's campaign.
Under fire from the White House, Michael Wolff defended raising questions in his new book about President Donald Trump's mental fitness as a responsibility of those who witness his behavior.
Mr Bannon was full of big ideas about what a right-wing "populist" campaign would look like. It's unclear what will happen next to Bannon, who joined Breitbart in 2012.
"Trump's private schedule, which was obtained by Axios, showed "executive time" listed from 8 a.m. until 11 a.m., when he was "in his residence, watching TV, making phone calls and tweeting.' He also had 'executive time" periods scheduled throughout each day". His famous "base" is well under 40 per cent of the public. Inevitably, these landed on Mr Bannon, who bragged more than was good for him about his power in the White House and asserted more than he should have.
Mr Kim called the 71-year-old president "the mentally deranged U.S. dotard". Breitbart's readers seemed to side with Trump in the spat. He was sacked by Trump nearly exactly a year after formally signing up with him. Their political world was not big enough for both.
The president hit back at Bannon, saying he had "lost his mind".
His reward was a key job inside the White House where, as chief strategist, he was seen as stoking the nationalist flame of Mr Trump's presidency. "They didn't have any lawyers", he told Wolff.
Based on conversations with top Trump aides, the book says Haley is "as ambitious as Lucifer" and is widely seen in Trump's inner circle as a potential replacement for the NY mogul at the top of the Republican ticket.
"It's not my fault people can't tell the difference between a book about Trump and a book about the bombing of Germany", Hansen told The Canadian Press.
But after repeated clashing with Ivanka Trump, the president's elder daughter, and Jared Kushner, her husband and Trump's senior adviser, Bannon was pushed out after less than eight months with the administration.
Bardella's remark about presidential ambitions refers to a December Vanity Fair article in which Gabriel Sherman reported that a White House run "has at least been a passing thought" for Bannon.
But those projects might require fundraising and Bannon, through his falling-out with Trump, has alienated the billionaire Mercer clan, which would have been his most natural source of financial support. Mr Trump has a record of threatening lawsuits without ever filing them, but even the threat can be costly to the putative target.
Nikki Haley, the USA ambassador to the United Nations, said she visits the White House once a week, and "no one questions the stability of the president".
Indeed, it has just been disclosed that the DOJ was reopening an investigation into the already thoroughly investigated matter of Mrs Clinton's e-mails.
To appear to give the Russian Federation inquiry credibility and to suggest the son that bears Donald Trump's name would be humiliated on his favourite medium of television - you can only imagine the reaction to that.