Just for the record, a couple of Trump Wannabes have filed a lawsuit in PA attempting to declare that mail-in voting violates the PA Constitution. I'm ashamed to say that one of them, Mike Kelly, is my Congressman (of course, I've been ashamed to say that from the day he was elected). The other was Trump's hand-picked (and unsuccessful) candidate to try and unseat Connor Lamb.
https://triblive.com/news/pennsylvania/suit-challenges-expansion-of-mail-in-voting-in-pennsylvania/ and
https://www.wpxi.com/news/top-stories/congressman-kelly-sean-parnell-file-lawsuit-get-mail-in-ballots-thrown-out-election-results/N4554N5P3VEUNATVSMJXMQXVUY/
I haven't read the Complaint, but they appear to be arguing that allowing mail-in voting violates the provision of the PA Constitution that says
Claiming that allowing votes to be delivered early and then opened and counted on election day violates this seems like a major stretch to me (they seem to be arguing that each time a ballot was filled out early transforms that day into an "election day").
They claim that the Act which allowed this year's voting violates the absentee provisions of the Constitution (arguing a pandemic is not an illness):
My off the cuff legal analysis is that this provision GUARANTEES absentee voting to a class of voters. It IS NOT a prohibition to allowing other voters to do so. They also seem to be overlooking the section of the PA Constitution that provides
If voting by mail is a method prescribed by law (and it was), then it's Constitutional. Case closed. Don't know why Kelly's legal training didn't cover this--oh, wait, maybe it's because he didn't get that training in order to become a car salesman. The PA courts need to slap these guys with sanctions for a frivolous suit.