PHILADELPHIA — Democrat John Fetterman verbally stumbled at times Tuesday night in what was some voters’ first and only chance to see him taking live questions ahead of Pennsylvania’s crucial U.S. Senate election Nov. 8. Recovering from a stroke, he argued he understands the struggles of everyday voters. Republican Mehmet Oz frequently dodged specific policy questions but attempted to cast himself as the centrist in the race — even as his answer on abortion rights will surely be featured in Democratic ads calling him out of step with Pennsylvanians. Here are some key takeaways from Pennsylvani…