US President Donald Trump and Democratic presidential nominee Joe Biden on Thursday night both held town hall events in which they responded to questions from voters.

The two events, which aired at the same time, were in lieu of the second presidential debate which was originally scheduled for Thursday. Trump bowed out of the debate after the Presidential Debate Commission announced it would be held online instead of in person in the wake of Trump's coronavirus diagnosis.

Trump’s town hall aired on NBC News while Biden’s town hall aired on ABC News.

During Trump’s town hall, the President said he could not definitively say whether he received a COVID-19 test on the day of the first presidential debate, despite a stipulation that both candidates were expected to arrive having tested negative for the virus.

Trump, who tested positive two days after the September 29 debate, said he felt physically well during the debate, but would not provide a clear response when asked whether he had taken a test on the day of the debate.

"I don’t know. I don’t even remember," Trump said when asked directly by the moderator, Savannah Guthrie.

"Possibly I did, possibly I didn’t," he said when asked the question again moments later.

Meanwhile, at his town hall, Biden blasted President Trump's response to the pandemic.

"He didn't talk about what needed to be done because he kept worrying, in my view, about the stock market," Biden said of Trump.

"He worried if he talked about how bad this could be, unless we took these precautionary actions, then, in fact, the market would go down. And his barometer of success of the economy is the market."

Biden also attempted to clear up his position on "court packing", the term for adding justices to the Supreme Court in order to get more sympathetic rulings.

At the beginning of his answer, Biden reiterated once again that he is "not a fan" of court packing but said that his position will depend on how the Supreme Court confirmation of Judge Amy Coney Barrett is "handled."

Asked what that means, Biden said it would be contingent on if there was a "real" debate on the Senate floor.

Pressed by moderator George Stephanopoulos if voters have a right to know about his position, he said, "They do have a right to know where I stand. They have a right to know where I stand before they vote."