Just to be clear, most Republicans are absolutely convinced that Democrats will use the massive number of mail-in ballots to cheat in the election.
The TRUTH About The Election Results That Democrats Want You to Ignore: https://youtu.be/kHl09NumBBM
In this video, the presenter attacks the political bias of PA Secretary of State Boockvar:
A Crisis Of Trust And A Close Election: https://youtu.be/oRvu1fzwVis
At 15 minutes into this video, PA Secretary of State Boockvar defends the election integrity in Pennsylvania. I found her assurances convincing:
PA Secretary of State Boockvar holds election update press conference: https://www.youtube.com/watch?v=NoxU1pWtWFs
My only problem with Pennsylvania is that their state supreme court said that late ballots must be counted regardless of whether it has no postmark or a late postmark, as long as it is in by Friday. This means that people could still vote today if they wanted to. This violates Pennsylvania election law. This definitely should be challenged in court if mail-in ballots cause Trump to lose Pennsylvania.