PHILADELPHIA — Josh Shapiro underscored his status as a potential national Democratic star. John Fetterman proved his assertion that he could win back at least some of the voters who had fled his party. In scoring two big wins for their party Tuesday night, both Democrats made points that reverberated nationwide. And results elsewhere affirmed Pennsylvania will remain at the center of the political universe come 2024. (Read: The ads aren’t stopping.) Here are takeaways from the election, and what we are still waiting for as of early Wednesday morning. Shapiro establishes himselfIn winning by d…