Although it had been a feature of elections in some parts of the United States for years, the phenomenon of mail-ballot voting exploded in the 2020 election. In the midst of the COVID pandemic, jurisdictions around the country expanded use of mail voting, sometimes sending ballots to every registered voter. Steps were taken to facilitate ease of mail voting, such as establishing drop boxes for returned ballots, relaxing rules regarding signature verification, and easing restrictions on “ballot harvesting,” the practice whereby paid political activists collect a large number of completed ballots and return them for counting. As a result, by some estimates, the proportion of ballots cast by mail nearly doubled from 2016 to 2020.
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