COCONUT CREEK, TAMPA, Florida (REUTERS) - President Donald Trump and Democratic rival Joe Biden rallied supporters on Thursday (Oct 29) in the closely fought state of Florida, highlighting their contrasting approaches to the resurgent coronavirus pandemic as the clock ticks down to Election Day.

Opinion polls show Mr Biden with a significant edge nationally, but with a tighter lead in the battleground states that play a decisive role in the final result.

A Reuters/Ipsos poll released on Wednesday showed Mr Trump had essentially moved into a tie with Mr Biden in Florida, with 49 per cent saying they would vote for Mr Biden and 47 per cent for the president.

With its 29 electoral votes, the state is a major prize in next Tuesday's election. Mr Trump's victory in Florida in 2016 was vital to his surprise election win.

Thousands of people, many of them without masks, crowded together at an outdoor event in Tampa on Thursday to hear Mr Trump mock his opponent, the former vice president.

"Could you imagine losing to this guy? Could you imagine?" Mr Trump said, adding he was confident of winning a second term.

The president also downplayed the pandemic, as he has done throughout the year, telling people that if they contracted the virus, they would "get better," just as he did after his own diagnosis.

Hours later, Mr Biden arrived in the same city to hold a"drive- in" rally, where attendees remained in or near their cars to avoid the possible spread of the virus, his second such event of the day in Florida. Supporters at the event wore masks, as required by Mr Biden's campaign, although they did not always maintain social distancing.

"Donald Trump has given up" on fighting Covid-19, said Mr Biden.

Mr Biden criticised Mr Trump for holding what he termed a "super-spreader event" and attacked the president's repeated assertion that the country had moved past the worst days of the pandemic, despite rising cases nationwide. "Donald Trump has waved the white flag, abandoned our families and surrendered to this virus," Mr Biden said. "But the American people never give up; we never give in.

With an eye on the important Latino vote in Florida, the Democrat pushed back on a Republican argument that Mr Trump would be tougher on the left-wing governments in Cuba and Venezuela.

"President Trump can't advance democracy and human rights for the Cuban people and the Venezuelan people when he has embraced dictators around the world," Mr Biden said. Many of South Florida's Latinos or their relatives fled Cuba or Venezuela.

Shadow of the pandemic

The pandemic that has upended life across the United States, killed more than 227,000 people and caused millions of job losses, is roaring back.

Mr Trump has repeatedly dismissed the threat of the pandemic, saying this week his opponents and the news media would stop paying attention to it right after the election, even as leaders in Europe scramble to contain a second wave and public health experts predict a grim winter in the United States.

Officials in Gastonia, North Carolina, warned people who attended an Oct 21 Trump rally there that two people who took part tested positive for Covid-19.

"Because of the large number of potential contacts from the rally, and the inability to alert them directly, the community is being notified so they can assess their own risk and take appropriate actions," officials said.

Mr Trump's own White House coronavirus task force is warning of a persistent and broad spread of Covid-19 in the western half of the United States, including in a number of states that will play an important role in the election.

"We are on a very difficult trajectory. We're going in the wrong direction," Dr Anthony Fauci, task force member and director of the National Institute of Allergy and Infectious Diseases, told CNBC on Wednesday night.

The Republican president hailed figures released on Thursday that showed the US economy grew at an unrivalled annualized pace of 33 per cent in the third quarter because of a huge federal pandemic relief programme.

"So glad this great GDP number came out before November 3rd," Mr Trump wrote in a tweet.

It is doubtful, however, whether economic data this close to Election Day can influence the outcome. Mr Biden can point out that US output remains below its level in the fourth quarter of 2019, before the pandemic hit.

Following his own bout with Covid-19, the president has had a hectic campaign schedule, holding as many as three rallies a day in different states, while Mr Biden has taken a more measured tack, spending two days this week close to his home base of Delaware.

A planned Trump rally in Fayetteville, North Carolina, for Thursday night was postponed because of a wind advisory stemming from Hurricane Zeta, Mr Trump's campaign said, truncating his visit to the state.

While there, the president awarded a citation to the Army special operations forces that conducted the raid that killed Islamic State leader Abu Bakr al-Baghdadi a year ago, White House spokeswoman Kayleigh McEnany told reporters.

Mr Biden's Tampa speech was cut short by a sudden downpour. He is expected to travel to Wisconsin, Minnesota and Iowa on Friday.

The president plans to return to the Midwest on Friday, campaigning in Michigan, Wisconsin and Minnesota. In all, he plans to visit 10 states in the last week of the campaign and will host 11 rallies in the final 48 hours, a campaign official said.

Early voting deluge

More than 80 million Americans have already cast ballots in the presidential election, according to a tally on Thursday from the US Elections Project at the University of Florida, setting the stage for the highest participation rate in over a century.

After a night of rainfall and thunderstorms due to Hurricane Zeta, early voting precincts in Georgia were experiencing power outages and some mobile voting sites were blocked off due to fallen trees.

Ms Casey Taylor, 37, a professional services consultant in Atlanta, ran 5km to a polling station at a library to vote early but she was turned away because of a power shortage. "I will now have to also pay to cast my vote," said Ms Taylor as she ordered an Uber ride to another precinct.

That surge includes more than 51 million ballots cast by mail, a long-standing practice of American elections that is surging in popularity because of the pandemic. State officials and experts have warned that it may take days or even weeks to tally them as some states have rules that forbid counting early votes before Election Day. On Thursday, a federal appeals court ruled that Minnesota's plan to accept ballots arriving up to a week after Election Day as long as they were postmarked by Nov 3 was illegal.

Florida is home to large Latino populations, with Cuban Americans in the south of Florida traditionally tending to favour Republicans, while newer communities of Puerto Ricans in central Florida lean toward the Democrats.

Mr Biden's campaign tried on Thursday to dampen concerns among Democrats that Mr Biden is not reaching Latino voters nationally as well as former President Barack Obama used to.

"We are 100 per cent on track to match or exceed the Obama Latino vote numbers in 2012," Mr Matt Barreto, co-founder of the polling and research firm Latino Decisions, said on a media conference call organized by the Biden campaign.