1st presidential debate between Trump and Biden spirals into chaotic clash

At the end of the first presidential debate, which lasted 98 minutes, ABC News calculated the candidate's approximate speaking times:

Trump: 37:16
Biden: 35:22

Here's the time spent on each individual topic including moderator speaking time:

Trump and Biden records: 16:23
The Supreme Court: 14:56 
COVID-19: 15:24 
The Economy: 14:42, with 2:38 spent on Trump's taxes
Race and violence in our cities: 17:07 
The integrity of the election: 11:35

When asked by Wallace if he would urge his supporters to stay calm during the extended period after the election when ballots are still being counted, Trump did not give a definitive answer. 

"I'm urging my supporters to go into the polls," Trump said. 

"I am urging my people -- I hope it's going to be a fair election, if it's a fair election," the president continued.

"You're urging them what," Wallace interrupted.

"I am 100% on board, but if I see tens of thousands of ballots being manipulated, I can't go along with that."

"What does that mean?" Wallace pressed. 

The president did not clarify. Trump has previously falsely claimed mail-in ballot fraud.

When Biden was asked the same question, he responded with a definitive, "yes."

"Here's the deal," Biden added. "The fact is I will accept it, and he will too. You know why? Once when the winner is declared after all the -- after all the ballots are counted -- all the votes are counted, that'll be the end of it."

Biden finished by saying he will "support the outcome" either way.

TRUMP'S STATEMENT: "Once you became vice president, (Hunter Biden) made a fortune in Ukraine and China and Moscow and various other places. He made a fortune, and he didn't have a job."

FACT CHECK: While the exact sum of Hunter Biden's foreign business ventures is unclear, ethics experts have broadly taken issue with them -- particularly those in places like Ukraine and China, at a time when his father was fronting U.S. policy there.

Robert Weissman, the president of progressive watchdog group Public Citizen, told ABC News last year, "at absolute minimum there's a huge appearance of conflict … (Joe Biden) should have encouraged his son to not take these positions."

Still, Weissman called Hunter Biden's business activity "orders of magnitude" less troubling than how the Trump family has operated its businesses during the Trump administration.

In an interview with ABC News last year, Hunter Biden said he exercised "poor judgment," but maintained that he made no "ethical lapses."

"I gave a hook to some very unethical people to act in illegal ways to try to do some harm to my father. That's where I made the mistake," he said. "So I take full responsibility for that. Did I do anything improper? No, not in any way. Not in any way whatsoever."

"Did I make a mistake? Well, maybe in the grand scheme of things, yeah," he continued. "But did I make a mistake based upon some ethical lapse? Absolutely not."

In their 87-page report released last week, Senate Republicans concluded that Hunter Biden's overseas endeavors were "awkward" and at times "problematic," but stopped short of identifying any criminal activity on Hunter Biden's part or any wrongdoing on Joe Biden's part. 

--ABC News' Lucien Bruggeman

The final question to both candidates was how will they reassure the American people that the next president will be the legitimate winner of this election.

Biden answered first by urging Americans to make a voting plan before they get to the polls, before assuring Americans that their mail-in votes would be counted. 

"His own homeland security director as well as the FBI director says there is no evidence at all that mail-in ballots are a source of being manipulated and cheating. They said that the fact is that there are going to be millions of people because of COVID that are going to be voting by mail in ballots -- like he does by the way, he sits behind the Resolute desk and sends his ballot to Florida."

"Number two, we're going to make sure that those people who want to vote in person, are able to vote," Biden added. 

Trump struck a different note warning of "fraud like you've never seen."

"As far as the ballots are concerned, it's a disaster," Trump said. "They're sending millions of ballots all over the country."

"I think we're going to do well because people are really happy with the job we've done. But you know what, we won't know -- we might not know for months, because these ballots are going to be all over," Trump added.

Elections officials in dozens of states have stood firm in expressing confidence to ABC News that they'll be able to effectively carry out expanded mail-in voting in November, despite Trump's repeated claims of rampant voter fraud.