Everywhere you look in Philadelphia, there are signs of the historic event taking place.
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Some love it.
"There's a lot of energy behind it, and I think everybody is going to be watching it," said Janet Arnold, of Indianapolis.
Others, hate it.
"My thought is there's too much Secret Service, too many police officers. It seems a lot of overkill," said Lilian Human of Rittenhouse Square.
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That increase in security is scaring some people away from areas.
We met the owners of Salty Paws, who tells us foot traffic is down 80%. They think it's because Vice President Harris is staying in the area and security is extremely tight.
With a crush of visitors in town and lane closures changing by the hour, people are adjusting their schedules.
For real-time updates on the debate, click here.
'The ABC News Presidential Debate | Race for the White House' will air September 10 at 9 p.m. It will air on ABC and stream on 24/7 streaming network ABC News Live, Disney+, and Hulu.