The GOP situation in Pennsylvania is dilemma for sure. The GOP incumbent Pat Toomey is retiring to keep a campaign promise (made back in the 90s, apparently) to limit his terms in office. So it's an opening for the Dems to flip the seat. The leading GOP candidate up to the primary has been Dr. Mehmet Oz... Yes, as in Dr Oz, the talk show host. I'm very puzzled as to why he's running as a Republican at all. His history shows him holding traditionally progressive views on abortion and transgenderism. He's arguably not conservative at all. Though I do remember him having a very positive interview with Jordan Peterson a few years back, so there's that.
There's also Kathy Barnette, who seems much more solid on issues like abortion and transgenderism. However, she's on record making some... controversial comments about Islam and homosexuality. I personally can see where she's coming from, but some commentators argue that these comments sink her chances at winning a statewide election in a purple state like Pennsylvania. She already ran for Congress before, and lost.
So one candidate who in all likelihood will turn out to be RINO, and one that is a solid conservative but may just not be viable with Pennsylvania's electorate. I don't envy the choice Pennsylvania Republicans have to make. If I was there though I would probably go with my conscience and vote for Barnette.