Heading into the town hall, Biden's campaign and the Democratic National Committee announced they raised a whopping $383 million in the month of September -- outpacing their August total of $364.5 million.

"That's more money than I've ever raised in my whole life!" Biden said in a video posted to Twitter late Wednesday, noting that the average donation was "something like $44 dollars -- it was under $50."

Biden's campaign manager, Jen O'Malley Dillon added to the announcement, announcing that the campaign has $432 million cash on hand.

"Our success has been driven by our grassroots supporters. $203 million came from online donors. We had 1.1 million new donors last month -- bringing the total to 5.5 million donors throughout this campaign. And as a result, we have $432 million in the bank," O'Malley Dillon tweeted.

The Trump campaign and Republican National Committee have not yet released September fundraising numbers. In August, they reported raising $210 million along with joint fundraising committees.

The second presidential debate, taking a town-hall format, was originally scheduled for Thursday. Now Biden and Trump are participating in separate town halls.

So what happened?

Trump disclosed on Twitter on Oct. 2 that he tested positive for COVID-19.

Six days later, the nonpartisan Commission on Presidential Debates announced the second debate in Miami would be virtual. It would maintain its town hall format, but unlike the first debate, the candidates would participate remotely from separate locations.

Biden agreed. Trump did not, telling Fox News moments after the announcement, “I’m not going to waste my time” on a virtual format.

With the president out, the Biden campaign signed on to an ABC News Town Hall.

The Trump campaign, hours after saying Trump would host a rally on Oct. 15 instead of debating, then said it would participate in the second debate if it was pushed back a week and the final scheduled debate also was pushed back a week.

But the Biden campaign quickly shot down the idea of rearranging the dates, saying they were agreed to back in June.

So Trump made plans to appear in a NBC town hall in Miami, taking place at the same time as Biden's ABC News town hall.

Amid the back-and-forth between the campaigns, the Commission on Presidential Debates officially canceled the second debate in a statement last Thursday saying, “It is now apparent there will be no debate on October 15.”

Both candidates have agreed to participate in the third and final debate, which is scheduled for Oct. 22.

The live, 90-minute special airs on ABC Television Network at 8 p.m. ET/5 p.m. PT.

For those looking for other ways to watch, it will also stream simultaneously on ABC News Live, which is available on Hulu, Roku, YouTube TV, Amazon Fire tablets and TV stick, Xumo, Sling TV, Facebook, Twitter, and the ABC News and ABC mobile apps.

A half-hour post-event show featuring the ABC News political team for more context and analysis will follow the town hall portion and is also available on streaming.

Biden and Trump will both face voters -- albeit not in the way envisioned by the debate commission or really any actual voters.

But however the collective audience sorts through an unusual evening, with Biden at an 8 p.m. ET ABC News forum in Philadelphia, and Trump at a competing event in Miami on NBC, voters are voting -- lots of them.

Records for this far out from Election Day are being set virtually by the hour and in virtually every state. Nationwide, more than 16 million ballots have already been cast, nearly five times the number logged at a similar point in 2016, according to records compiled by the most prominent authority on early voting, Michael McDonald of the University of Florida.

In Georgia, more than 537,000 mail ballots have already been accepted and returned, compared to some 200,000 in all of 2016. The start of in-person voting there brought hours-long lines this week; there have been similar scenes in Texas, where more than half a million voters showed up on the first day available to vote.

Nine states are already above 20% of their total 2016 turnout -- Election Day votes included -- with nearly three weeks left to vote. In-person voting starts in another key battleground -- North Carolina -- on Thursday.

It's too soon to extrapolate particular outcomes out of the interest in voters casting ballots early. Polls indicate a huge pre-Election-Day edge for Biden, and a sizeable Trump advantage among those who plan to vote on Nov. 3 itself.

Regardless, for all the noise around election integrity and distaste for politics generally, votes are pouring in. Biden and Trump are engaging with voters who have not only mostly made up their minds, but are acting on it every minute of the next 19 days.

-ABC News Political Director Rick Klein

BIDEN'S CLAIM: Biden claimed that neither he nor the doctors he has spoken with had not seen a plan from the administration to distribute a COVID-19 vaccine. "There should be a plan," he said. "When we have the vaccine, how do we distribute it?"

FACT CHECK: The Trump administration does have a plan to distribute a potential COVID-19 vaccine, although the president has misrepresented how quickly it could be distributed.

Some of that plan was outlined in a Sept. 16 "Distribution Strategy," released jointly by the U.S. Department of Health and Human Services and Department of Defense.

The documents, according to HHS, provide an overview of distribution plans along with guidelines for "state, tribal, territorial, and local public health programs and their partners on how to plan and operationalize a vaccination response to COVID-19" in their communities.

The Trump administration also created "Operation Warp Speed," a partnership between HHS and DOD, as well as other private and federal agencies, to accelerate the research, development and eventual distribution of COVID-19 vaccines and treatments.

HHS Secretary Alex Azar has said that as part of Operation Warp Speed, federal officials have been laying the groundwork for vaccine delivery. "This in-depth, round-the-clock planning work with our state and local partners and trusted community organizations, especially through CDC, will ensure that Americans can receive a safe and effective vaccine in record time," Azar said in a press release last month.

Meanwhile, the Centers for Disease Control and Prevention executed a contract with McKesson -- the company that distributes the annual flu vaccine -- to distribute the COVID-19 vaccine when it becomes available.

Trump, though, has exaggerated how quickly most Americans could receive it, suggesting it would be widely available by the end of the year or even sooner. Federal public health officials and outside experts say most Americans will not be able to get vaccinated until well into next year.

-ABC News' Arielle Mitropoulos and Sony Salzman