Here's what the Heritage Foundation Website demonstrates.
The plurality of vote fraud doesn't come from the voter: it comes from either Canvassers, Cullers, or Campaigns.
When it IS a voter casting a fraudulent vote, it's almost always ONE illegal vote.
The usual fraudulent vote is the garden-variety type: dead housemate with an absentee ballot; addled elderly moved and forgot; moved and purposely forgot; and if in-person...usually once by mail, once in-person. The rarest is in-person multiple votes at the same precinct.
The ROI for the fraud is ludicrously bad: up to $10,000 and a year in jail PER VOTE. And if you're in America illegally, deportation.
States average about 1 conviction per state per year.
Fraud at scale is self-defeating: the larger the conspiracy, the more impossible to keep secret.
Regarding Presidential elections, it's a foregone conclusion in roughly 80% of the states. A stolen vote in MA or WY would be like a fart in a very large windstorm.
When a reason why is given, the most common answer is, I was convinced the other side was doing it.
" Exactly how many LEGAL votes are you willing to suppress, to keep those FOUR illegal votes in Texas from happening?"
EVERY Suppressionist avoids this question like the plague.