Voting fraud is generally a statistically insignificant issue. It's election fraud that is the issue.
More here: https://www.findlaw.com/voting/how-u-s--elections-work/what-...
More here: https://www.findlaw.com/voting/how-u-s--elections-work/what-...
edit: on a side note, that website’s description of electoral fraud is pretty sloppy. In their bullet points of what constitutes electoral fraud they include ballot harvesting. Their description of ballot harvesting is not illegal everywhere.