PUBLISHED: 01:58, Tue, Oct 27, 2020 | UPDATED: 01:58, Tue, Oct 27, 2020
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.”
Mr Biden’s wife, Jill, who was sitting next to him at the time of the address, appeared to try to correct him, whispering “Trump” under her breath.
Tweeting from his controversial Twitter account, President Trump mocked his opponent, claiming he “could not remember my name”.
Mr Trump wrote: “Joe Biden called me George yesterday. Couldn’t remember my name.
Donald Trump mocks Joe Biden after embarrassing 'George' blunder (Image: Getty)
“Got some help from the anchor to get him through the interview.
“The Fake News Cartel is working overtime to cover it up!”
The Republican leader’s comments divided Twitter users, with many coming up with their own theories for the blunder.
Some claimed Mr Biden was referring to George Lopez, one of the hosts of the rally for Latino voters, and whose question he was answering.
Joe Biden appeared to call Donald Trump by the name of 'George' (Image: Getty)