Photos: How debate night unfolded in Philadelphia

Vice President Kamala Harris and former President Trump 's Tuesday night showdown took over Philadelphia, from a heavy police presence to protests to presidential campaign billboards.

• Scenes from the city, in photos:

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Hundreds of pro-Palestinian protesters (pictured above) marched from Philadelphia 's City Hall, down Market Street to the National Constitution Center ahead of the presidential debate .

• Meanwhile, hundreds more gathered on a part of Independence Mall opposite the center, including pro-Israel demonstrators, anti-abortion activists and supporters of PETA, the animal rights group.

Large metal fencing blocks access to the National Constitution Center. Photo: Mike D'Onofrio/Axios

The perimeter of the National Constitution Center was walled off by 6-foot metal fences and surrounded by police.

Photo: Mike D'Onofrio/Axios

Along Market Street, buildings were wrapped in political ads from both candidates.

Photo: Mike D'Onofrio/Axios