It’s frustrating that the public don’t seem to have enough information to make a good judgement. I’ve heard about statistically improbable differences between exit polls and the returned vote count, but here is the most detailed and damning discussion of the topic I’ve ever seen – reported in Rolling Stone in June.
The article by Robert F Kennedy Jr. presents data indicating that a variety of mechanisms were used to disenfranchise voters in Ohio – and it indicates that the errors almost exclusively favoured the Republicans at the expense of the Democrats.
I wish I really knew. It’s not much of a democracy if we tolerate this kind of thing.