Recount.
Supervised, recorded recount.
But due to our cherished secret ballot laws, once a tainted ballot is separated from its outer envelope and gets put into the system, there is no way to later cull it out.
So all you can do is recount the tainted ballots a second time.
Maybe the GOP is finally learning how to play the game...
Could be THEY held these back to see what they needed to pass the dems fraud...???
Maybe...
Nope. 4am mail vote dumps have hopelessly fouled the counts.
Re-vote or simply refuse to seat the PA electors. The (R) PA legislature can also remedy by appointing R electors, but that would take a spine.