Vice President Kamala Harris will hold a rally in Pennsylvania on Tuesday to announce her running mate.This will be Harris’ first visit to Pennsylvania as the presumptive Democratic nominee for president, after formerly securing the nomination on Monday. The trip also marks her seventh visit to the commonwealth this year and the 17th since she was sworn in as vice president in 2021.During the event, Harris will introduce her running mate, although it still remains unclear who that will be. She has reportedly narrowed her choice down to two candidates: Pennsylvania Gov. Josh Shapiro and Minnesota Gov. Tim Walz.The Harris campaign is touting enthusiasm in Pennsylvania, saying that more than 33,000 people …