Voters and candidates in Mississippi and Virginia filed four separate cases seeking judgments that certain amendments to their states' election laws and procedures were subject to the pre-approval requirements of section 5 of the Voting Rights Act of 1965, and hence were not enforceable until the state complied with the requirements. The district courts found that the Voting Rights Act did not apply to the voting changes in the four cases and dismissed the complaints. The voters and candidates filed direct appeals, and the cases were consolidated.
https://www.oyez.org/cases/1968/3