Donald Trump has mocked ‘Sleepy’ Joe Biden for forgetting who was president after the Democrat candidate said ‘we need to stop four more years of George.’

The incident was one of the recent errors of Biden which Trumpers say put a question mark on his mental state. Some even claim Biden, 77, is going senile and suffers a form of amnesia.

Biden was last night addressing a virtual concert when he said: ‘Four more years of George, er, George, er, he – we’re going to find ourselves in a position where, if Trump gets elected, we’re going to be in a different world.’

The 77-year-old appeared to receive a prompt from his wife Jill who was sitting beside him, muttering ‘Trump’ under her breath.

Hours later President Trump blasted Biden, tweeting: ‘Joe Biden called me George yesterday. Couldn’t remember my name. Got some help from the anchor to get him through the interview. The Fake News Cartel is working overtime to cover it up!’

Many speculated that Biden was thinking of George W. Bush, president from 2001-09, or perhaps George H.W. who was in office from 1989-93.

The blunder once again raises questions about Biden’s mental capacity – a topic Trump has repeatedly referenced in the run-up to the election.

‘Who’s the president?’ Is the line you a doctor would usually ask if you’d had a bang on the head.

The moment was seized upon by Trump War Room, a pro-Trump group which claims to ‘punch back 10x harder’.

On social media, people were dismayed.

Another remarked: ‘The look on Jill’s face was like ‘come on Joe, get the train back on the tracks…”

Biden and Jill appeared during the star-studded ‘I Will Vote Concert’ which was headlined by A$AP Ferg, Sara Bareilles, Aloe Blacc, the Black Eyed Peas, Jon Bon Jovi and Cher.

It garnered around 12,000 views and was live-streamed on YouTube.

It comes just two days after the former Vice President said during a campaign video: ‘We have put together, I think, the most extensive and inclusive voter fraud organization in the history of American politics.’

This too was seized upon by the Trump campaign, White House Press Secretary Kayleigh McEnany who tweeted: ‘BIDEN ADMITS TO VOTER FRAUD!’

Earlier on Sunday, Biden, in an interview with 60 Minutes, laughed off Trump’s attacks on his mental agility.

‘Hey, the same guy who thought that the 911 attack was a 7-Eleven attack?’ Biden responded.

‘He’s talking about dementia?

‘All I can say to the American people is watch me, is see what I’ve done, is see what I’m going to do. Look at me. Compare our physical and mental acuity.

‘I’m happy to have that comparison.’

He insisted it was Trump – not him – who was losing his grip on reality.

‘The way he’s handling COVID is just absolutely totally irresponsible,’ said Biden.

‘He’s telling people that we’ve turned the bend, in one of his recent rallies. Well, he’s gone – as my grandpop would say he’s gone round the bend. I mean, we are in real trouble.’

However, Biden was unable to walk away from the interview without mangling his data on public schools.

‘I can send every single qualified person to a four-year college in their state for $150 billion,’ he said.

CBS later said that Biden’s advisers later told them he misspoke, and meant to say double that.

The Trump campaign has in recent months turned up the heat on its claim that Biden’s mental capacity is fading.

At rallies the president has repeatedly stated that Biden is ‘gonzo.’

‘He’s gonzo folks. He’s gone. He has no idea, and the people that are running that party are radical far-left maniacs.’ Trump told a rally in Arizona earlier this month.

The President has joked about Biden ending up in a care home during his tenure and the office being taken over by his running-mate Kamala Harris.

A campaign advert in August asked: ‘Did something happen to Joe Biden?’

Biden, who would be the oldest ever president, has denied the accusations against him saying that he is ‘constantly tested.’

In June he said: ‘Look, all you gotta do is watch me, and I can hardly wait to compare my cognitive capability to the cognitive capability of the man I’m running against.’

Biden’s blunders: From claiming 200 million Americans have been wiped out by Covid to forgetting the Declaration of Independence

August 8, 2019: He tells the Asian & Latino Coalition in Des Moines, Iowa, that ‘poor kids are just as bright and just as talented as white kids.’

He attempted to clear up his statement, adding: ‘Wealthy kids, black kids, Asian kids — no, I really mean it. But think how we think about it … mWe think how we’re going to dumb it down. They can do anything anybody else can do given a shot.’

Later that day he tells a crowd: ‘We choose unity over division. We choose science over fiction. We choose truth over facts.’

August 9: Biden was accosted by a right-wing Turning Point USA staffer at a rally in Iowa. ‘How many genders are there?’ He asked.

Biden replied: ‘There are at least three.’

The reporter said, ‘What are they?’

And Biden responded: ‘Don’t play games with me, kid.’ Biden then shook someone in the crowd’s hand before turning back and saying, ‘By the way, the first one to come out for marriage was me.’

August 10: Biden says he was VP when the Parkland school shooting took place, even though it occurred in 2018.

‘Those kids in Parkland came up to see me when I was vice president,’ he told a reporter.

A campaign official clarified that Biden meant the shooting at Sandy Hook Elementary School in Connecticut, in December 2012.

Report by MailOnline