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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.

Top stories:

Here is how the day is developing. All times Eastern.
Oct 31, 2020, 3:06 PM EDT

Obama joins Biden, slams Trump's COVID-19 response

Former President Barack Obama and Vice President Joe Biden are campaigning in Detroit and Flint, Michigan, Saturday in their first in-person appearance together on the 2020 campaign trail. 

Former US President Barack Obama joins Democratic presidential candidate Joe Biden at a campaign event in Flint, Mich., Oct. 31, 2020.
Jim Watson/AFP via Getty Images

At the first event in Flint, Obama removed his “VOTE” mask to tell the drive-in crowd, “this Tuesday, everything is on the line.”

Former President Barack Obama speaks at a rally for Democratic presidential candidate former Vice President Joe Biden, at Northwestern High School in Flint, Mich., Oct. 31, 2020.
Andrew Harnik/AP

“Our jobs are on the line, our health care is on the line,” Obama said.

Obama bashed President Trump's response to the pandemic, saying, "If Trump were focused on COVID from the beginning, cases wouldn't be reaching new record highs."

"Trump cares about feeding his ego," the former president said.

Supporters at a rally with Democratic presidential candidate former Vice President Joe Biden and former President Barack Obama at Northwestern High School in Flint, Mich.,Oct. 31, 2020.
Andrew Harnik/AP

Supporters line a road leading to a rally for Democratic presidential candidate former Vice President Joe Biden and former President Barack Obama at Northwestern High School in Flint, Mich., Oct. 31, 2020.
Andrew Harnik/AP

"Joe's not going to call scientists idiots," Obama said. "He's not going to host super-spreader events."

"Tweeting at the TV doesn't fix things," Obama said, but "Biden has concrete plans."

"Joe's plan will guarantee paid sick leave for workers and parents affected by the pandemic. He'll make sure the small businesses in every community ... can reopen safely," he said.

Biden then joined Obama, telling the crowd, "It's time for Donald Trump to pack his bags and go home. We're done with the chaos ... the failure, the refusal to take any responsibility."

Former US President Barack Obama introduces Democratic presidential candidate Joe Biden at a campaign event in Flint, Mich., Oct. 31, 2020.
Jim Watson/AFP via Getty Images

"Imagine where we'd be if we had a president who wore a mask instead of mocking it," Biden said.

Both Detroit and Flint are Democratic strongholds. But in 2016, declines among some of the Democrats’ core constituencies helped Trump win Michigan by under 11,000 votes. 

Hillary Clinton won both Wayne and Genesee counties, home to Detroit and Flint, but her margins were significantly less than Obama in 2012. 

-ABC News' Kendall Karson

Oct 31, 2020, 2:51 PM EDT

Melania Trump on COVID-19: US has 'made great progress'

First Lady Melania Trump made a campaign visit to Wisconsin Saturday, stressing that the pandemic “is not a partisan issue” and claiming “the Democrats want to project feelings of fear and doubt, purely for political reasons."

First Lady Melania Trump greets supporters during a campaign rally at Kingsheart Farm in West Bend, Wisc., Oct. 31, 2020.
Andrew Caballero-Reynolds/AFP via Getty Images

As the U.S. reaches its highest number of daily coronavirus cases, the first lady said, “We have made great progress in our fight against COVID-19… When COVID-19 invaded our country, we first had to learn what it was, how it spreads and how to prevent it.”

“Joe Biden said this will be a dark winter … his solution is to move backwards and to shut things down,” she said. “When my husband talks about the future, it is filled with continued possibility and forward thinking.”

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