President Trump gave journalist and writer Michael Wolff access to his team and the White House in the run-up to, and after, his election in November 2016.
Wolff observed the transition of a Trump campaign he writes was sure it wasn't going to beat Hillary Clinton, to an administration trying to get a handle on power it never thought it would have.
Now, he's written a book about it – Fire and Fury: Inside the Trump White House. The first excerpt was released on Wednesday in the New York Magazine, titled: "Donald Trump didn't want to be president," while another section was seen by The Guardian.
What do they say?
The New York Magazine excerpt is awash with tantalizing claims from within the Trump campaign and later the White House, compiled from the access Wolff had – including conversations with Trump himself – as well as comments from more than 200 sources.
It describes the president's apparent short attention span when dealing with the day-to-day responsibilities of his office, phone calls he would receive from Rupert Murdoch and ranting calls he would make to casual acquaintances, as well as warring behind the scenes between son-in-law Jared Kushner, former Chief of Staff Reince Priebus, and former adviser and Breitbart editor Steve Bannon.
It also suggests that the hope among many in the campaign was a narrow loss to Hillary Clinton, which would result in their careers being catapulted into stardom.
But there are some discrepancies with the excerpt, including a part where Trump claims to never have heard of former House Speaker John Boehner (they're regular golf buddies), which is leading some to call into question the veracity of Wolff's story.
But at the same time, others note that Wolff did appear to have increased access to the White House than other D.C. press.
What's the biggest controversy?
The biggest thing to come from the book so far relates to the section obtained by The Guardian, which features comments made to Wolff by Bannon.
Bannon described one crucial meeting – involving the president's son, Donald Trump Jr., Kushner and former campaign manager Paul Manafort (who has since been indicted) and Russians with ties to the Kremlin – as potentially "treasonous."
It was reported last year by the New York Times that the trio held the meeting at Trump Tower after an intermediary promised them documents that would "incriminate" Hillary Clinton, to which Trump Jr. replied in an email: "I love it."
As Bannon said to Wolff: "The three senior guys in the campaign thought it was a good idea to meet with a foreign government inside Trump Tower in the conference room on the 25th floor – with no lawyers. They didn’t have any lawyers.
“Even if you thought that this was not treasonous, or unpatriotic, or bad s--t, and I happen to think it’s all of that, you should have called the FBI immediately."
Bannon's comments come as special counsel Robert Mueller continues his investigation into the Russian interference with the 2016 elections.
What's the president saying?
Through his spokeswoman Sarah Huckabee Sanders, the president has released a scathing denouncement of Bannon, his former ally, whom he says has "lost his mind" since leaving the White House.
"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," Trump said in part.
His full statement can be seen below.