Support WBURA new mail-voting exhibition is a reminder that its use dates back to the Civil WarPlay02:54Download AudioHansi Lo WangAugust 24, 2024 ShareThe "Voting by Mail" exhibition at the National Postal Museum in Washington, D.C., tracks the long history of mail-in voting in the United States with a selection of historical ballot envelopes, election mailers and photographs. (NPR)