In NY last week, many voters were disappointed to find that they could not take a Republican ballot because they were not registered Republicans.
Nationwide (which includes open primaries), the Democratic vote is WAY DOWN.
Voter registration in Pa is about 4:3:1 D:R:I. Currently it is about 5:3 D:R in total votes. Now that could change dramatically if Philly came in early. But if it doesn’t change then PA is basically out of reach unless Trump wins all 1 million+ independents and others.