What did Democrats do wrong?

[P.J. Denyer]

But it happens so infrequently, or in such small numbers, the response looks to me to be taking a sledgehammer to kill a mosquito. There is much more legitimate fraud taking place that really needs addressing, e.g., voter disenfranchisement. Think Florida 2000 where (mostly) black voters were removed from the register.

Yes that's the point I've been making. No-one ever stole an election by going around from polling station to polling station casting a single in person vote at each and hoping the real voter who's name they have hasn't got there first. After voter ID requirements were introduced in the UK by the Conservatives their Leader of the House of Commons at the time it was introduced Jacob Rees-Mogg admited on camera that the intention had been to make it harder for groups that don't usually vote for them to vote & easier for their voters. It backfired on them, badly.