Shelby County v. Holder is a landmark Supreme Court case decided in 2013 that invalidated key provisions of the Voting Rights Act of 1965. Specifically, the Court struck down the formula used to determine which jurisdictions were required to seek federal approval before changing voting laws, arguing that it was outdated and unconstitutional. This decision significantly weakened federal oversight of state voting laws, raising concerns about voter suppression and discrimination in the context of civil rights.