Trump votes early in Florida as Obama urges voters to support a 'normal president'

“It won't be so exhausting, just having a normal president,” he told the crowd, who were scattered across the outdoor venue or sitting in their cars with their windows open.

“You’ll be able to just go about your lives knowing that the president is not going to suggest injecting bleach [as a cure for coronavirus] or retweet conspiracy theories about cabals running the world.”

“Donald Trump isn't going to suddenly protect all of us – he can't even take the basic steps to protect himself.”

Obama’s comments come days after he joined the campaign trail in Pennsylvania – another critical battleground that could decide the fate of the November 3 poll.

But, shortly after he finished the speech, Trump tweeted out in response: “Nobody is showing up for Obama’s hate laced speeches. 47 people! No energy, but still better than Joe!”

Earlier, the President had cast his ballot at a library in West Palm Beach, before hitting the campaign trail for rallies in three swing states on Saturday: North Carolina, Ohio and Wisconsin.

Trump switched his permanent residence and voter registration last year from New York to Florida, where the latest RealClearPolitics polling average place him just behind Biden by 1.5 points.

In Ohio, Trump continued to play down the risks of the virus, even as the state set another daily record for reported COVID-19 cases.

He also used the packed rally to play a video of numerous times Biden appeared to contradict himself on the issue of fracking, a process used to drill oil and gas, that is a source of jobs for many Americans.

Biden also hit the campaign trail on Saturday, speaking first at a drive-in rally in Bucks County, Pennsylvania, where he warned of a looming "dark winter" without an adequate response to coronavirus.

"It's going to be a dark winter ahead unless we change our ways," he said of Trump's attempts to contain the coronavirus, which has killed more people in the United State than any other country.

Later, Biden enlisted the support of rock legend Jon Bon Jovi at another rally in Luzerne County, just near Biden's childhood home of Scranton, Pennsyvlania.

Luzerne is a former coal mining region in the state’s north-east, which flipped to Trump in 2016. At the rally, Biden told supporters: “Let me get something straight here in coal country – I will not ban fracking, no matter how many times Donald Trump says it."

"But unlike Donald Trump, I don't think big oil companies need a handout from the federal government. We're going to get rid of the $40 billion fossil fuel subsidies, and we're going to invest it in clean energy and carbon capture.”

With 10 days to go in the campaign, about 54.2 million Americans have already cast early ballots, a pace that could lead to the highest voter turnout in more than a century, according to data from the US Elections Project.

Florida voted in favour of Obama twice, but Trump believes he is likely to win the state this year, partly with the help of Hispanic voters, many of whom support the President's pro-business policies and anti-socialist rhetoric. Whoever wins the state will pick up a large block of 29 Electoral College votes.