Trump once again asserted that if elected president, he would pardon Jan. 6 rioters, including ones who attacked police officers.

"If they're innocent, I would pardon them," he said. "They were convicted by a very, very tough system."

Trump was asked directly if he would be willing to take a cognitive test and told attendees that he suggested he and Biden would take one, adding, "now, I'd do it with [Kamala Harris] too."

The former president added, "You know what, she failed her law exam ... so maybe she wouldn't pass the cognitive test." The comment drew boos from the audience.

In the room at NABJ, a few people tried to shout during the conversation and were shushed. It's unclear what the people were shouting.

Trump said on the panel that he would "absolutely" consider stepping down if elected president again and his health was declining.

Trump said he would know himself if his health was declining. He then attacked ABC News' Rachel Scott again, saying she treated him "so rudely." There are a few gasps in the audience every time he attacks her.

"I want anybody running for president to take an aptitude test to take a cognitive test," Trump said. "I think it's a great idea. And I took two of them and I aced them."

Trump defended Vance in response to a question about whether he knew in advance about Vance's views about people who don't have children. Vance has over recent years made a number of negative statements about people without children.

"No, I know this. He is very family-oriented and he thinks family is a great thing. That doesn't mean he thinks that if you don't have a family, it's not — I know people with families. I know people with great families. I know people with very troubled families. And I also know people with no families that didn't meet the right person. Things happen," Trump said.

He continued, "You go through life, you don't meet the right person. I'm just talking about families here and people that don't have children...He strongly believes in family, but I know people with great families, I know people with not great families, that don't have a family. And the people without the family are far better. They're superior in many cases, okay. He's not saying they're not. What he's saying is that he thinks the family experience is a very important thing."

Later, when asked if Vance would be ready to step in should Trump need to step aside, Trump said, “Historically, the vice president, in terms of the election, does not have any impact. I mean, virtually no impact."

The United Auto Workers has endorsed Vice President Kamala Harris over Republican presidential nominee and former President Donald Trump.

The union’s endorsement shouldn’t be surprising. UAW President Shawn Fain has been outspoken against Trump. The Detroit union also has historically supported Democrats, including President Joe Biden.

It comes after Biden withdrew his re-election bid and endorsed Harris to become the Democratic nominee against Trump.

Fain and Trump have been at odds — publicly trading remarks — since the union leader was elected early last year. Trump called for Fain to be fired during a speech earlier this month at the Republican National Convention.

The union responded with a post calling Trump a “scab and a billionaire,” continuing “that’s who he represents. We know which side we’re on. Not his.”

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More boos and gasps as Trump aggressively goes back and forth with Rachel Scott who attempted to move the conversation forward. “You’re the one that held me up for 35 minutes," he said. He had blamed audio issues for why the panel started late.

Near the beginning of the panel discussion, Trump referenced people "that happen to be taking Black jobs," a phrase that drew laughs, which he first used during the June presidential debate against Biden.

The former president was subsequently asked what a "Black job" is, to which he answered, "A Black job is anybody that has a job. That’s what it is," before pivoting back to speaking about illegal immigration and the Southern border.

The first question came from ABC News journalist Rachel Scott, who asked Trump why Black voters should trust him after he has made countless derogatory comments about minorities.

"You have pushed false claims about some of your rivals, from Nikki Haley to former President Barack Obama saying that they were not born in the United States, which is not true," Scott said.

"You have used words like 'animal' and 'rabbit' to describe Black district attorneys. You've attacked Black journalists calling them a 'loser' saying the questions that they asked are, 'Stupid and racist,'" she continued. "You've had dinner with a white supremacist at your Mar-a-Lago resort. So my question sir, now that you are asking black supporters to vote for you, why should Black voters trust you after you have used language like that?"