Mail-in voting benefits Republicans, contrary to what President Donald Trump might say. Mail-in voting could help Republicans by encouraging retirees to vote, who often skew Republican.
Mail-in voting also largely disadvantages minority voters. African-American voters, for example, traditionally rely on in-person voting and are more likely to have changed their address recently.
Also, 18-21-year-old voters—who are infrequent yet Democratic voters—had their ballots rejected nine times more than their elderly counterparts in Florida's 2018 election. In the same election, minorities were twice as likely to have their ballots rejected as their white counterparts.