Also, the Shooter was a Trump voting registered republican

Lots of people change parties to vote in primaries, it only means he wanted to vote in it since the dem side was irrelevant this year

He was 20 years old and had not even had a chance to vote in a presidential election. But, yes. Apparently he had registered as a republican.

Because of PA weird laws voters often register in opposing party to vote in the opposing party primary. No he was nor a Republican

Source?