Former President Barack Obama is hitting the campaign trail for Biden with his first in-person event -- a drive-in car rally in Philadelphia on Wednesday.

While Obama has participated in several fundraisers on behalf of Biden's campaign and gave a prime time speech during the Democratic National Convention in August -- in which he excoriated Trump over his handling of the coronavirus pandemic and extolled Biden's leadership -- his trip to Philadelphia marks a new phase of his advocacy for the Democratic ticket.

In choosing Pennsylvania, Biden's team is also signaling how critical it thinks the Keystone State will be to unseating Trump, who carried it by just under 45,000 votes in 2016.

-ABC News' Johnny Verhovek

The Biden campaign is continuing to target Hispanic and Latino voters in the final two weeks until Election Day, launching four new television ads in several states and two new digital Spanish and bilingual ads in an effort to combat attacks the Trump campaign is launching against him.

Targeting Latino populations in key battleground states, including Florida, Pennsylvania, Arizona, Minnesota, Nevada, North Carolina, Virginia and Wisconsin, the campaign will hit on several different issues in the four TV ads including Trump's handling of the coronavirus pandemic and aftermath of Hurricane Maria in Puerto Rico.

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-ABC News' Molly Nagle

Reacting to the Commission on Presidential Debates saying it would mute the candidates’ microphones during their opponent’s initial responses at Thursday’s debate, Trump said "the whole thing is crazy" and went on to criticize the moderator, Kristen Welker.

In a wide-ranging interview with "Fox and Friends" this morning, Trump explained what he sees as the advantage in interrupting Biden constantly versus letting him talk.

"When somebody stands there and he lies, lies, lies, I like to challenge it at the time, because you don't have time to go back," Trump said. But, he added, he had heard from others it could be good to let Biden speak. "They said if you let him talk, he'll lose his chain of thought because he's gonzo."

On the topics chosen, Trump echoed his campaign manager's insistence that the debate should be about foreign policy, even though the Commission on Presidential Debates and the candidates had agreed months ago the topics would be left up to the moderator.

"This was supposed to be a foreign policy debate, and now all of a sudden we're talking about things that are not foreign policy. And, frankly, it was a change that they made that was far bigger than the mute button, I mean, frankly. But they made a change, and it shouldn't have happened," Trump said.

Asked if he was nervous about the debate, Trump said, "No, I'm not nervous."

Trump headlines a Sinclair Town Hall event in the Rose Garden this afternoon before departing with the first lady for a campaign rally in Erie, Pennsylvania, this evening. He's said his exchanges with reporters will serve as his debate prep.

Biden, meanwhile, has hunkered down in Wilmington, Delaware, for debate prep ahead of Thursday, similar to what he's done before previous debates.

-ABC News’ Ben Gittleson

Voters in Florida weathered downpours that swept across a big portion of the state Monday and still managed to shatter the state's opening-day record for in-person early voting, with at least 350,000 people casting ballots. But some Florida voters faced hurdles that election officials had pledged would not be an issue.

The Orange County Supervisor of Elections Office website suffered a technical issue that prevented some users from accessing the site for several hours. Danae Rivera-Marasco, communications and community outreach coordinator, told ABC News that while it took two to three hours to resolve the issue for the majority of users, some trying to access the website via an AT&T connection were still unable to access it in the evening.

The election office said the issue was “not due to traffic or hacking” and said there hadn’t been a security breach.

In Broward County, voters reported waiting in lines for hours, just days after a spokesman for the county’s supervisor of elections told ABC News he did not expect to see lines at polling sites.

“We rarely have lines during early voting as it is, so this is likely to be even less, simply because of the fact that so many voters are now voting from the kitchen table,” said Steve Vancore, the Broward County elections spokesman, over the weekend.

One voter in Miramar, Florida, told ABC News she waited for close to three hours to vote. In a text, Vancore attributed the back-up there to voter enthusiasm and social distancing.

-ABC News’ Will McDuffie

Struggling in the polls in battleground Pennsylvania and targeting the votes of suburban women, Trump had hoped for an assist from his wife Melania Trump at a rally this evening, but a "lingering cough" from her recent bout with the coronavirus scuttled the plan, according to the first lady's spokeswoman.

Instead, the president will make the trip to the northeastern Pennsylvania city of Erie without her, part of an attempt to defend his narrow win in Pennsylvania in 2016. Fewer than 2,000 votes separated him from his Democratic opponent, former Secretary of State Hillary Clinton. Four years earlier, then-President Barack Obama won the state by nearly 17%.

Recent polls have shown former Biden with a clear lead in Pennsylvania. In a Quinnipiac poll released Oct. 7, the Democratic nominee led by 13% among likely voters. A poll from Monmouth University published the day prior showed a similar lead, with Biden up 12% among registered voters. FiveThirtyEight's Pennsylvania polling average shows Biden leading by 6.4%.

-ABC News’ Jordyn Phelps and Ben Gittleson