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Election 2020 updates: Obama, Biden finish day of campaigning in Detroit

More than 91 million people have cast their ballots -- an early voting record.

Last Updated: November 1, 2020, 11:19 AM EST

With three days until Election Day, and President Donald Trump and former Vice President Joe Biden racing toward Nov. 3, more than 91 million Americans have already cast their ballots -- an early voting record.

On Saturday, Biden's top surrogate, former President Barack Obama, is joining him for the first time on the trail with drive-in rallies in Flint and Detroit.

Trump has four rallies in Pennsylvania as both candidates plan to "barnstorm" the state they deem critical in the final days before the election with the contest overshadowed by coronavirus cases rising there and in nearly every battleground territory.

Vice President Mike Pence has a pair of rallies in North Carolina -- a state Trump won by four points in 2016. California Sen. Kamala Harris is campaigning in Florida as Democrats vie for the state's 29 electoral votes key to Trump's pathway to the White House.

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Here is how the day is developing. All times Eastern.
Oct 31, 2020, 1:36 PM EDT

Pence says vaccine 'just a short time away'

Vice President Mike Pence jogged to the stage for his first rally of the day in Elm City, North Carolina, where he asked supporters to repeat the 2016 outcome and vote to reelect President Donald Trump.

Pence wore a mask before and after his remarks, only taking it off to speak. There were a few hundred supporters in attendance, but the majority were not wearing any face masks and were not social distancing.

Pence said that a COVID-19 vaccine is “just a short time away” and that nurses and doctors would have the supplies needed to continue treating patients as cases rise across the country.

Although Trump said the U.S. is "rounding the turn" Saturday, Pence admitted, "we continue to contend with this pandemic, we see cases rising in communities around the country."

“We are just a short time away, before the end of this year, of having the first safe coronavirus vaccine, and tens of millions of doses for the American people," Pence said. "We’re gonna continue to move heaven and Earth to make sure that our doctors and nurses have all the supplies and resources they need."

-ABC News' Justin Gomez

Oct 31, 2020, 1:27 PM EDT

Trump supporter disrupts Kamala Harris’ remarks in Miami

When vice presidential candidate Sen. Kamala Harris spoke to supporters in Miami on Saturday, she was interrupted by a male protester who shouted pro-Trump and anti-Biden slogans.

Biden supporters tried to intervene by putting Biden signs in the protester's face. The protester was escorted out by security. 

Amid the disruption, Harris urged those in the audience not to be distracted. 

“We're not gonna be distracted by what's at hand," Harris said, as the crowd cheered. "We're not gonna be distracted by the stakes.... We know what we have to do."

Democratic vice presidential nominee Kamala Harris speaks during a drive-in rally at Florida International University in Miami, Oct 31, 2020.
Chandan Khanna/AFP via Getty Images

Supporters listen as Democratic vice presidential nominee Kamala Harris speaks during a drive-in rally at Florida International University in Miami, Oct. 31,2020.
Chandan Khanna/AFP via Getty Images

"You gotta ask, why are these powerful people trying to make it so difficult for us to vote?" she said.

Harris also has stops in Fort Lauderdale and Lake Worth, Florida, Saturday.

-ABC News' Averi Harper

Oct 31, 2020, 1:25 PM EDT

Trump says Pennsylvania 'will save the American dream'

At the first of his four Saturday rallies in the battleground state of Pennsylvania, President Donald Trump told the crowd, "this is the state that will save the American dream."

"A great red wave ... is forming," Trump said in Bucks County. "And there's not a thing they can do about it."

Supporters say the pledge of allegiance before President Donald Trump holds a rally in Newtown, Penn., Oct. 31, 2020.
Mark Makela/Getty Images

When Trump brought up Democratic nominee Joe Biden, some in the crowd yelled "lock him up!"

"I fought harder for you than any president," Trump said.

"Nobody has done in three-and-a-half years, nobody, no administration, no president what we've done and what we've accomplished... Nobody even challenges that," Trump said, without mentioning the coronavirus pandemic.

Supporters applaud as President Donald Trump speaks at a campaign rally at Keith House, Washington's Headquarters, Newton, Pa., Oct. 31, 2020.
Alex Brandon/AP

Trump, in a calm, subdued, voice, continued, "Do not be intimidated by our opponent's angry and menacing tone. Because if we were, we would never have been able to accomplish what we've accomplished. In truth, they are actually terrified of you, the people.

US President Donald Trump speaks at a "Make America Great Again" rally in Newton, Pa., Oct. 31, 2020.
Mandel Ngan/AFP via Getty Images

Trump later mentioned COVID-19, saying "we're rounding the turn," even though the U.S. on Friday set a new daily case record for the second straight day.

The Bucks County rally was held outside but social distancing was not enforced. Many were seen without masks.

In 2016, Trump narrowly won Pennsylvania by 44,000 votes – less than 1% of the total ballots cast in the state.

PHOTO: Supporters of President Donald Trump arrive to a rally in Reading, Pa.,  Oct. 31, 2020.
Supporters of President Donald Trump arrive to a rally in Reading, Pa., Oct. 31, 2020.
Spencer Platt/Getty Images

Oct 31, 2020, 11:57 AM EDT

Obama to campaign in Georgia and Florida on Monday

Former President Barack Obama will hit the campaign trail solo on Monday, visiting the battleground states of Georgia and Florida, the Biden campaign announced Saturday.

Former US President Barack Obama speaks at a Biden-Harris drive-in rally in Miami on Oct. 24, 2020.
Chandan Khanna/AFP via Getty Images, FILE

In Atlanta, Obama will campaign with U.S Senate candidates Jon Ossoff and Rev. Raphael Warnock.

Obama's plans for Florida were not released, but the Biden campaign said the former president will be in South Florida.

-ABC News' John Verhovek