Trump lost his temper during mock Mueller interview: Woodward book

President TrumpDonald John TrumpHouse Republican threatens to push for Rosenstein impeachment unless he testifies Judge suggests Trump’s tweet about Stormy Daniels was ‘hyperbole’ not defamation Rosenstein faces Trump showdown MORE lashed out at aides during a practice interview earlier this year intended to prepare him for a possible sit-down with special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE, according to a new book from veteran journalist Bob Woodward.

The Washington Post, which obtained a copy of the book, reported Tuesday that former Trump attorney John Dowd arranged a mock interview for Jan. 27. As Dowd rattled off a series of questions about the investigation into Russian interference in the 2016 election, Trump reportedly stumbled over his answers and contradicted himself.

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“This thing’s a goddamn hoax,” Trump said, sparking a 30-minute rant.

“I don’t really want to testify," he concluded, according to the book.

The book goes on to describe Trump's paranoia about the Russia probe as unrelenting, with the president telling aides that "everybody's trying to get me," after Mueller was appointed in May 2017.

Woodward, who is best known for his work investigating the Watergate scandal of the Nixon administration, wrote his latest book based on hundreds of hours of interviews with firsthand sources, meeting notes, personal diaries, files and documents.

The book — "Fear: Trump in the White House" — is set to be released on Sept. 11.

Trump frequently blasts the Mueller investigation as a "witch hunt" and a "hoax." He has recently alleged that the special counsel has conflicts of interest, and told Bloomberg News in an interview last week that he believes the probe is "illegal."

The president and his legal team have given mixed statements on whether Trump will sit for an interview with Mueller. After publicly declaring on multiple occasions that he would be willing to testify for Mueller, the president's attorneys have since expressed skepticism that such an interview will take place.