For months, President Trump has alleged without evidence that any expansion of mail-in voting in the 2020 election will lead to "tremendous" fraud and a "rigged" election.
But an APM Reports analysis of voter data from Wisconsin's April primary shows a far more measurable and consequential effect of mail-in voting — rejected ballots. Slightly more than 23,000 ballots were thrown out, mostly because those voters or their witnesses missed at least one line on a form.