BTW, my suspicions about hacking election returns began in 2018, when I voted for Democrat Tony Evers. He beat Scott Walker by 1.1% of the vote. I stayed up until 1:30 AM election night watching the county-by-county returns. It was odd, and though I wanted Evers to win, I started to suspect that funny business was afoot. By 12:30, the race was tied, going back and forth by the minute, and five counties had not had all precincts reported: Milwaukee, Dane, La Crosse, Bayfield and Portage Counties. One might expect Milwaukee to be last, as the most populous county. Perhaps Dane, in which Madison is located. However, why La Crosse and Portage? La Crosse isn't particularly populous and Portage is even smaller. Bayfield is smaller yet. What the five had in common was that every one of them were traditionally Democratic strongholds. Portage and Bayfield lie within a sea of red surrounding counties. Every other county small in population had reported all precincts a while before. Walker moved ahead just before this dead time. Then Dane, Portage, and Bayfield reported and more precincts in Milwaukee began reporting, and Evers moved ahead to stay. I thought at time, "Gee, if I didn't know better, I would swear that someone waited until all other counties were counted to see how many votes Evers needed to wrap this up."
For what it's worth, I also think it's plausible that Bush campaign allies somehow hacked the system in Ohio in 2004, after Kerry looked to be on his way to winning, and also in 2012. In 2012, Anonymous put out a video and published logs for what they claimed was an attempt to hack the system in Ohio, and that they blocked it. At the same time that this was allegedly happening, Karl Rove was going ballistic on Fox, essentially claiming that it was impossible that Obama was winning in Ohio.
I suspect elections have been hacked in the past, against both Republicans and Democrats. I think it's possible that it happened in 2020, as well. Probably not, but possible.