McDonald v. Board of Election Commissioners of Chicago
McDonald v. Board of Election Commissioners of Chicago, 394 U.S. 802 (1969), was a unanimous decision by the Supreme Court of the United States that an Illinois law that denied absentee ballots to inmates awaiting trial did not violate their constitutional rights under the Fourteenth Amendment.
Source: Wikipedia — McDonald v. Board of Election Commissioners of Chicago (CC BY-SA 4.0)