“I think the GOP likes keeping extreme Leftist radicals in office to fundraise against.”
That may serve a larger purpose as you implied, but it’s not like they had much choice here. They could have crossed over into the Rat primary to vote for the slightly lesser of two evils, but Lee has a consistent track record of hatred to vote against in November and perhaps that will provide inspiration for voters.
The deck is still heavily stacked against them in PA-12, but if the GOP can find some benefit in the situation then more power to them.
Not that easy to cross over in Pennsylvania. We are a closed primary state. A change in party registration needs to be made at least 30 days before an election.