Kamala Harris introduces running mate Tim Walz at raucous Philadelphia rally

Diane Harris, 59, of Philadelphia, said at the rally she was among those small-dollar donors who had given to the campaign in recent days.

In the eyes of Joseph Alston, a 69-year-old Democratic committee member in the town of King of Prussia who attended the rally, Walz was an excellent choice. Although he was previously unfamiliar with the Minnesota governor, Alston believe Harris was wise to choose a running mate from a midwestern state.

The Republican vice-presidential nominee will follow Harris and Walz across the country, staging dueling events at several stops along their multi-day battleground state tour.

Melissa Hellmann contributed reporting