Philadelphia Mayor Cherelle Parker is out with a new video supporting Vice President Kamala Harris’ presidential campaign — but some have speculated she may have inadvertently revealed Harris’ pick for vice president, as it reportedly wasn’t supposed to be released for a few more days. “Proud to be back with so many leaders from across our region supporting @KamalaHarris for President and @JoshShapiroPA for VP! We are One CITY, One REGION, and ONE Commonwealth United!” wrote Parker’s X account. The video included several people proclaiming their support for Harris for president, and Pennsylvan…