Every 4 years Republicans and media people claim that Pennsylvania might just go Republican this year, and every 4 years it doesn't. It isn't quite as stupid as the "Jewish voters might vote Republican" narrative, which also pops up every 4 years, but close.
If a Republican wins PA, it'll be in a national landslide election. It won't be the state that puts one over the top. In presidential elections, Philly votes Dem, Pittsburgh votes Dem, the Philly suburbs lean/vote Dem, and there just aren't enough people in the rest of the state.
But every 4 years...