Trump's supporters drove into the place where Biden was campaigning, honking his horn, shouting, causing the Democrats to criticize them as "idiots".

Democratic presidential candidate Joe Biden on 24/10 held a campaign in Bristol, Pennsylvania, an important battlefield committee in the upcoming election.

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A video on social media showed a Trump supporter shouting "four years from now," a slogan from the US President's statement "we'll win four more years" in August.

"I am running as a proud Democrat. I will run as an American president," Biden said at the campaign.

"I will work hard for both my supporters and my non-supporters, including those who are screaming at portable loudspeakers out there. The duty of a president is to take care of and heal relations.

"By the way, we're not doing the dumb, the Trump supporters, with the loudspeakers out there. It's polite," Biden criticized those who stirred up the campaign outdoors.

Twitter account Jcremeans said in 25 minutes of speaking, Biden twice complained that he could hear the group of Trump supporters shouting, honking outside his event.

Both Biden and Trump are working hard to campaign in key battlefield states, as presidential elections take place in less than 10 days.

National polls show that Biden is ahead of Trump, but only marginally better in some battlefield states such as Florida, which often determine winners in US presidential elections.

Trump also dismissed the poll results, saying that the US media "just wanted to discourage you".

Trump continued to show optimism after voting for himself in Florida, becoming one of 55 million US voters to vote early.