Biden jokes as he puts on Republican’s Trump 2024 cap: ‘I need that hat’

In a bitter and fraught US election, a rare moment of jollity broke through when video of Joe Biden joking with a Trump supporter about his age and trying on his Trump 2024 hat went viral.

At an event on Wednesday in Pennsylvania, Biden even joked with the man that he could not remember his own name.

In a video of the exchange that went viral online, Biden is seen exchanging wisecracks with the man at an event on Wednesday in Pennsylvania.

Then, when trying on the man's Trump hat, Biden warned the crowd against eating "cats and dogs" in reference to debunked claims made by Trump during the debate on Tuesday that immigrants were eating people's pets in Springfield, Ohio.

The clip of the interaction shows the man wearing the Trump 2024 hat, approaching the president, and Biden offering him his own presidential seal cap to wear.

"You remember your name?" the man sarcastically asks Biden, to which the president jokingly responds: "I don't remember my name ... I'm slow."

The man proceeded to call the president an "old fart".