Trump vs Harris Presidential Debate: Candidates go on attack in zinger-filled showdown

A majority of debate watchers think Harris won the debate against Trump, according to a poll taken by CNN and SSRS after the debate.

On who won the debate, 63% of debate watchers said Harris and 37% said Trump.

The poll has a margin of error of +/- 5.3% points.

CNN said that before the debate, respondents were split 50%-50% on who would win.

In June, their instant poll found that among debate watchers, 33% thought Biden won and 67% thought Trump won.

-ABC News' Oren Oppenheim

During brief remarks at a campaign watch party, Harris said today was "a good day" but told the crowd that "we've got some work to do."

"We have 56 days to go and, guys, we are still the underdogs in this race -- it's tight," she said. "We have got to win Pennsylvania, and we are going to win Pennsylvania."

Harris was introduced by her husband, Doug Emhoff, who said the vice president "showed everyone, especially Donald Trump, what a real leader is."

President Joe Biden reacted to the debate in a post on X early Wednesday morning.

"America got to see tonight the leader I've been proud to work alongside for three and a half years. Wasn't even close," he said.

Biden was in New York City during the debate and will be attending the 9/11 memorial services at Ground Zero later in the day.

Harris and Trump met for their first presidential debate on Tuesday night. The consequential matchup was hosted by ABC News at the National Constitution Center in Philadelphia.

Read a transcript of what was said in the 90-minute debate here.