Smith v. Allwright, 1944 (8-1 decision)

Primary elections must be open to voters of all races.

Harper v. Virginia State Board of Elections, 1966 (6-3 decision)

A state’s conditioning of the right to vote on the payment of a fee or tax violates the Equal Protection Clause of the Fourteenth Amendment.

Bush v. Gore, 2000 (5-4 decision)

No recount of the 2000 presidential election was feasible in a reasonable time period.

Shelby County v. Holder, 2013 (5-4 decision)

States and localities do not need federal approval to change voting laws.