Senior Democrats have turned on Joe Biden in a bombshell new book claiming to expose the shocking full extent of his decline.

The book, by co-authors CNN anchor Jake Tapper and Axios correspondent Alex Thompson, also alleges the former president and his inner circle 'totally f***ed us' and handed the election to Donald Trump.

Exposing what they say was a concerted and long-term cover-up of Biden's failing powers, Tapper and Thompson say that in one disturbing incident the frail president allegedly failed to recognize legendary Hollywood mega-star George Clooney and 'was barely capable of stringing two sentences together' even before his grueling 2024 campaign began.

Due out in a few days, their book suggests that, despite repeated assurance from those close to him, Biden had been in cognitive decline since as far back as 2015.

And that a 'Politburo' of trusted advisers, including Mike Donilon, Steve Ricchetti, and Bruce Reed, plus members of Biden's family, effectively aided him as he 'stole' the election from the Democrats and 'the American people' because of their selfish insistence that 'an addled old man' should stand again.

The authors don't mince their words - and neither do the slew of furious Democrats who have contributed to the book, Original Sin: President Biden's Decline, Its Cover-Up, and His Disastrous Choice to Run Again.

In one excoriating summary, Tapper and Thompson suggest the decision to push Biden to run for re-election in 2024 was 'shockingly narcissistic, self-delusional and reckless – a desperate bet that went bust and part of a larger act of extended public deception that has few precedents…

'The decision to run again, the Original Sin of this president, led to a campaign of denial and gaslighting, leading directly to Donald Trump's return to power.' 

Senior Democrats have turned on Joe Biden in a bombshell new book claiming that the former president and his inner circle 'totally f***ed us' and handed the election to Donald Trump .

Jake Tapper (pictured) and Alex Thompson suggest the decision to push Biden to run for re-election in 2024 was 'shockingly narcissistic, self-delusional and reckless – a desperate bet that went bust and part of a larger act of extended public deception that has few precedents…

Tapper and Thompson (pictured) claim Biden 'was barely capable of stringing two sentences together' even before the grueling campaign began.

So outraged are influential Democrats that a number have allowed their names to be used in the book, including David Plouffe, who managed Obama's successful 2008 campaign. 'We got so screwed by Biden as a party,' Plouffe is quoted as saying.

In one of the most shocking revelations, Biden was reportedly so impaired that he didn't recognize Clooney at a star-studded June 2024 Democratic fundraiser in Los Angeles, the book says, claiming it left the actor 'shaken to his core.'

'It was obvious to many standing there that the president did not know who George Clooney was,' the authors write.

Another Hollywood VIP guest reportedly said: 'It was like watching someone who was not alive. It was so awful.'

Weeks after that LA fundraiser, and following Biden's disastrous TV debate against Trump, Clooney wrote a now-infamous op-ed for The New York Times calling for Biden to drop out of the race.

The tactfully-worded article didn't go into details but Clooney wrote that, in private, the president was, indeed, 'the same man we all witnessed at the debate.'

In another passage of this new book, Tapper and Thompson describe how in June 2023, former president Barack Obama allegedly visited Biden to 'kick the tires.'

He told Biden that Trump would be formidable and left Biden with a warning.

'Just make sure you can win the race,' he said.

Yet the Biden's 'physical deterioration' was so advanced that 'that there were internal discussions about putting the president in a wheelchair, but they couldn't do so until after the election,' the authors write.

After Biden finally dropped out of the race, on July 21, 2024, David Plouffe was drafted to help Harris in her eleventh-hour attempt to beat Trump.

This 'rescue mission' was 'a f***ing nightmare', the former Obama staffer tells the authors. Biden 'totally f***ed us.'

From production trickery during filmed appearances, to severely limited work periods for the ageing president, the book also reveals the extraordinary measures taken to prevent the public - and the rest of the Democratic Party - from seeing what they say was the true scale of Biden's infirmity.

At 82, Biden was already the oldest president in the history of the republic when he finished his term in office.

When the White House aides filmed his appearances, they would use more than one camera, allowing 'jump cuts' (switching from one view to another) to obscure his stumbles, according to the book.

Original Sin says that from January 1, 2023 to April 27, 2024, the president had undertaken only four public events before 10.00 am.

He had 12 clear weekends with no public events, and, claim the authors, only 12 public events after 6.00 pm most of which were off-camera.

But the president's issues weren't a recent development. The authors claim that by 2020, during Biden's first campaign, he already could no longer follow conversations and a special team was hired to edit his verbal stumbles out of campaign ads. 

The authors say he had trouble recording even mundane thoughts without fluffing his lines.

'Biden often couldn't make it through one or two minutes without botching a line or two,' one source says.

Biden was reportedly so impaired that he didn't recognize George Clooney at a star-studded June 2024 fundraiser in Los Angeles, the book reveals, claiming it left the actor 'shaken to his core.' (Biden is pictured at the fundraiser with Clooney, Julia Roberts and Barack Obama). 

Original Sin, published by Penguin Random House, will be all-the-more disturbing to the Democratic establishment as CNN anchor Jake Tapper has been regarded as a liberal commentator sympathetic to Biden.

One prominent Democratic strategist who once publicly defended Biden is quoted saying that the former president 'stole' the election from the American people.

Another leading Democrat had been assured that the president was 'fine', but when he met Biden in person, he found the First Lady, Jill Biden, was finishing some thoughts for him.

'He was clearly not f***ing fine,' this source tells the authors.

On Friday, Biden was treated at Philadelphia hospital after a 'small nodule' that required 'further evaluation' was discovered on his prostate, said a spokesman, who declined to provide more details.