I would assume that canvassing with false information would then become a federal crime, as it would be a conspiracy to prevent a legally compulsory act. Add in bounties for whistle-blowers who can show conspiracies like this, and internal greed will prevent these types of shenanigans.
Voting is a fundamental right to self-expression and self-determination. And I think that any attempt to prevent a citizen from voting or preventing a legitimate vote from counting (barring votes that are unable to be interpreted) should be considered treason.
> I would assume that canvassing with false information would then become a federal crime, as it would be a conspiracy to prevent a legally compulsory act.
Lots of the suppression tactics that are like this (as opposed to the suppression-disguised-as-anti-fraud efforts) are already federal crimes. Doesn't stop them from happening.
Making voting compulsory wouldn't change this (nor would it stop people from proposing anti-fraud efforts that make voting more difficult in practice. Just because voting is compulsory for people who are qualified doesn't mean that there aren't non-citizens and criminals who are forbidden to vote, and that you can't sell bureaucratic "safeguards" that make it more difficult for qualified people to prove that they are qualified in order to vote as mechanism to prevent the unqualified from voting.)
Voting is a fundamental right to self-expression and self-determination. And I think that any attempt to prevent a citizen from voting or preventing a legitimate vote from counting (barring votes that are unable to be interpreted) should be considered treason.