A record 75% of Americans can vote by mail in 2020

Richard L. Hasen, a professor of law and political science at the University of California, Irvine, said he remained “very worried” that scores of voters would be disenfranchised through no fault of their own. Because many voters will be unfamiliar with the mail voting process, he and other experts said, they were concerned that voters could make unintentional technical errors when marking, signing, sealing or sending a ballot, leading to their ballots eventually being rejected.