All coinciding with a large, engineered, split in pandemic cautiousness about attending in-person voting stalls between the two main parties. There are more examples, gerrymandering is a decades-long one, but most of what I've read & heard about 2020 was about forcing people to wait in long lines or vote in person when that would favor one party over the other.
I'm with you on the other things, but outside of the Maine, Nebraska, and the historical quirk that is two Dakotas, gerrymandering can't have a direct effect on presidential elections.
The 'direct' effect qualifier is important though -- gerrymandering state-level elections to the point where a population can be discouraged from voting would very likely have a top-line Presidential election impact too.
Destroying equipment the USPS would use to handle the unusually large number of mail-in votes: https://www.cnn.com/2020/08/21/politics/usps-mail-sorting-ma...
All coinciding with a large, engineered, split in pandemic cautiousness about attending in-person voting stalls between the two main parties. There are more examples, gerrymandering is a decades-long one, but most of what I've read & heard about 2020 was about forcing people to wait in long lines or vote in person when that would favor one party over the other.