In contrast, about 74 per cent of Trump supporters expect Trump to win, with only 6 per cent anticipating a Biden victory.
Vice President Mike Pence would typically preside over Monday's vote, but after a close aide testing positive, it was unclear whether he would attend.
The tally by the independent US Election Project, run by the University of Florida, said that as of Sunday more than 59 million people had voted so far.
The vice presidential candidate has been spending quite a substantial amount of time in this battleground state, which like 2016, is headed for a tight race.
The November 3 election, in which incumbent Trump is fighting to secure a second term in office, is being closely watched across the Arab world, where the United States plays a key role.
The voting bonanza has some Democrats optimistic that decades of low turnout and undisputed Republican dominance may soon be a thing of the past.
Later addressing her supporters at Cuyahoga Community College, Harris talked about the crisis of systemic racism.
Trump is seeking second term to help himself and his wealthy friends, says Ex-US President Barack Obama
Responding to Obama, Trump, in a tweet, later said that no one is showing up for the former US president.
During the meeting, Haley revealed that she told the president-elect that she was not the right fit for the job of the top American diplomat, but she was ready to help him in any way he wanted.
Speaking at a campaign event in Pennsylvania, a battleground State, on Saturday, he said Trump opened doors for big banks to make money in China.
President Trump called India 'filthy'. It's not how you talk about friends and it's not how you solve global challenges like climate change, Biden said in a tweet.
Trump's remarks came in response to being asked if he was in support of wearing facial coverings as a means to curb the spread of the coronavirus disease.
US elections 2020: After chaotic first debate, here's what to expect from Trump, Biden's second attempt
Their first debate was punctuated by frequent interruptions, mostly from Trump, leaving the two men talking over each other and Biden eventually telling the president to 'shut up.'
Dr Shobha Choklingam asserted that Trump has supported India and Prime Minister Narendra Modi on the issue of Kashmir.
Here are some of its biggest steps and missteps it's taken in the fight against misinformation since 2016.