Grasping at straws I see. The reason the number for Democrats has gone down is that we aren't in the throes of a pandemic now. In 2020, Democrats were much more likely to be cautious regarding COVID than the moron Trumpers, so many more of them did the mail-in ballot thing. Easy to understand.
And, while Harris most certainly can win without PA, if you believe the polls (I don't), not only does 538 have her up by 0.7%, RCP has Trump up by 0.2%, but recently polling has shown that Democrats are greatly under represented...also, A+ poll Morning Consult has Harris up 3 points in PA.
BUT, none of the above matters. 13 Keys says Harris will win...and she will.
Get your hot cocoa and blankie ready.