WASHINGTON, Oct 14 (Reuters) - Three more U.S. states opened polls for early voting on Wednesday, and President Donald Trump planned to hold another rally to make up for time lost on the campaign trail to his bout with the coronavirus.

More than 13 million Americans have cast ballots, setting a record early pace, according to the U.S. Elections Project at the University of Florida. Many seek to avoid the large crowds expected on Election Day, Nov. 3.

In the last presidential election, some 1.4 million Americans had cast early votes as of Oct. 16, 2016.

About two dozen people showed up more than two hours before polls opened in Memphis, Tennessee, to claim spots in line, local media reported, as voting opened in Kansas, Rhode Island and Tennessee.

In Georgia, where long lines snaked out of polling places and down sidewalks on the first two days of early voting this week, Gwinnett County election officials reported waits of up to three hours to cast early ballots on Wednesday.

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A U.S. District Court judge extended voter registration in Virginia through Thursday after a severed cable line caused the state's website to crash on Tuesday, the final scheduled day of registration.

The Republican Trump, trailing Democrat Joe Biden in national and some key state opinion polls, will stage a rally at the Des Moines, Iowa, airport. Biden has a virtual fundraiser and gives pre-recorded remarks to a Muslim advocacy group.

On Thursday, Trump and Biden, who had been due to hold a second presidential debate, will instead take part in dueling televised town halls. NBC News said Trump's event in Miami would take place outdoors to prevent the spread of the coronavirus.

Biden's ABC News event will take place in Philadelphia.

That Trump, who battled the virus earlier this month, is traveling to Iowa so close to Election Day suggests his campaign is concerned about the state's voters' support for his re-election. Trump beat Democrat Hillary Clinton there by almost 10 percentage points in 2016, but opinion polls have shown the state to be competitive.

RELATED: Where do Republican President Donald Trump and Democratic challenger Joe Biden stand on the issues? Here's a topic-by-topic look at the two major-party candidates for the Oval Office

Biden widens lead

Trump looks to be spending much of the week aiming to galvanize his white, conservative base rather than seeking to appeal directly to undecided voters, many of whom live in the country’s suburbs.

On Thursday, he heads to Greenville in rural North Carolina, a closely fought state where early voting will begin that day, then on to rural Georgia and central Florida the next day.

Reuters/Ipsos polling released this week showed Biden widening his lead in the key states of Wisconsin and Pennsylvania – states Trump won in 2016.

Democratic presidential candidate Joe Biden delivers remarks during a voter mobilization event, at Miramar Regional Park in Miramar, Florida, on Oct. 13. REUTERS/Tom Brenner
Democratic presidential candidate Joe Biden delivers remarks during a voter mobilization event, at Miramar Regional Park in Miramar, Florida, on Oct. 13. REUTERS/Tom Brenner

Iowa has experienced a spike in COVID-19 cases, with hospitalizations at an all-time high. Republican Governor Kim Reynolds has resisted any statewide containment measures such as a mandate to wear masks and urged Trump supporters on social media to turn out en masse for the president.

Trump's illness has put the focus of the campaign's closing stretch squarely on his response to the coronavirus, with Biden repeatedly criticizing Trump's handling of a pandemic that has infected more than 7.8 million people in the United States, killed more than 214,000 and put millions out of work.

In Florida on Tuesday, Biden told seniors at a community center that Trump had recklessly dismissed the threat that the virus had posed to their at-risk population.

"To Donald Trump, you’re expendable. You’re forgettable," Biden said.

Trump has touted his handling of the crisis.

The Trump campaign said it would conduct temperature checks and hand out masks at his rallies but not require attendees to wear them.

(Reporting by James Oliphant; Editing by Noeleen Walder, Peter Cooney and Howard Goller)