The 15th Amendment to the U.S. Constitution prohibits the federal government and every state from denying or restricting a citizen’s right to vote based on race, color, or former status as an enslaved person. Congress passed it on February 26, 1869, and it was ratified on February 3, 1870, making it the last of the three Reconstruction Amendments.1National Archives. 15th Amendment to the U.S. Constitution: Voting Rights (1870) The rule was clear on paper. It took another 95 years, and the Voting Rights Act of 1965, before it worked in practice.
What the Text Says
Section 1 is one sentence: “The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any State on account of race, color, or previous condition of servitude.”2Congress.gov. U.S. Constitution – Fifteenth Amendment “Abridged” reaches any interference that weakens the practical value of your vote, not just an outright ban. “Previous condition of servitude” was aimed at formerly enslaved people, making sure their past legal status could never be used against them at the ballot box.
The scope was deliberately narrow. The amendment targets racial discrimination in voting and nothing else. It did not give women the right to vote, and it left states free to set their own rules on age, residency, and other qualifications. The Reconstruction framers debated covering other excluded groups but limited the amendment to race.3The Yale Law Journal. The Unabridged Fifteenth Amendment
Congress’s Power to Enforce It
Section 2 gives Congress power to enforce the amendment “by appropriate legislation.”2Congress.gov. U.S. Constitution – Fifteenth Amendment Before the Reconstruction Amendments, states controlled voter eligibility with almost no federal oversight. This single sentence changed the balance, letting Congress override state voting rules when those rules discriminate by race.
Congress used the power almost immediately, passing the Enforcement Act of 1870 to make interference with the right to vote a federal crime. The real test came nearly a century later. In South Carolina v. Katzenbach (1966), the Supreme Court upheld the Voting Rights Act of 1965, ruling that the 15th Amendment grants Congress “full remedial powers” to address racial discrimination in voting.4Oyez. South Carolina v. Katzenbach The enforcement clause, the Court confirmed, authorizes aggressive federal action against state discrimination at the polls.
How States Evaded the Amendment for Nearly a Century
The amendment banned racial discrimination in voting, but it did not ban every form of voter restriction. For decades, states exploited that gap with rules that never mentioned race yet were built to exclude Black voters. Most operated together as a system.
Literacy Tests
Prospective voters had to read, write, or interpret legal texts before they could register. Local officials had near-total discretion over what counted as a passing answer. In some states, applicants had to transcribe and interpret a section of the state constitution, with registrars picking the passage and grading the response.5National Museum of American History. Literacy Tests Some versions were designed to be impossible. One state gave applicants 30 paradoxical questions in 10 minutes, with registrars free to change the rules or interpret answers however they wished. White applicants often had time limits waived or were passed without scrutiny, while Black applicants could be failed for a single spelling error.6Tennessee Secretary of State. The State of Louisiana Literacy Test
Poll Taxes
Poll taxes required voters to pay a fee before casting a ballot. The amounts were small in absolute terms but enough to price out low-income citizens, and unpaid fees often accumulated year to year.7Ronald Reagan Presidential Library & Museum. Constitutional Amendments – Amendment 24 – Elimination of Poll Taxes The 24th Amendment, ratified on January 23, 1964, banned poll taxes in federal elections. Two years later, the Supreme Court finished the job in Harper v. Virginia Board of Elections (1966), ruling that conditioning the vote on payment of any fee violates the Equal Protection Clause of the 14th Amendment.8Justia U.S. Supreme Court Center. Harper v. Virginia Bd. of Elections, 383 U.S. 663 (1966)
Grandfather Clauses
Grandfather clauses exempted people from literacy tests or poll taxes if they or their ancestors had been eligible to vote before a specific date, typically January 1, 1867. Because that date preceded the 15th Amendment, no Black citizens could qualify. Illiterate white voters registered freely while Black voters faced rigged exams.9Constitution Annotated. Amdt15.S1.2 Grandfather Clauses The Supreme Court struck grandfather clauses down in Guinn v. United States (1915), holding that a provision tied to conditions predating the amendment “recreates and perpetuates the very conditions which the Amendment was intended to destroy.”10Justia U.S. Supreme Court Center. Guinn and Beal v. United States, 238 U.S. 347 (1915)
White Primaries
In the one-party South, the Democratic primary was the only election that mattered. State parties declared themselves private organizations and restricted membership to whites, arguing that a private club could set its own rules. In Terry v. Adams (1953), the Supreme Court rejected that reasoning, finding that the combined machinery of the association and the official party “deprives petitioners of their right to vote on account of their race and color.”11Justia U.S. Supreme Court Center. Terry v. Adams, 345 U.S. 461 (1953)
The Voting Rights Act of 1965
After decades of court fights picking off tactics one at a time, Congress attacked the whole system. The Voting Rights Act of 1965 used the enforcement power in Section 2 of the amendment to dismantle the architecture of voter suppression at once. President Johnson signed it 95 years after ratification.12National Archives. Voting Rights Act (1965)
Its most immediate effect was a nationwide ban on literacy tests and similar screening devices. It also created preclearance under Section 5, which required jurisdictions with a documented history of discrimination to get federal approval, from either the U.S. Attorney General or the D.C. District Court, before changing any voting law or procedure.13Department of Justice. Section 4 of the Voting Rights Act The Attorney General could also send federal examiners to register voters and observers to monitor elections, so local officials could not quietly introduce new barriers.
Section 2 of the act, now codified at 52 U.S.C. § 10301, provides a permanent, nationwide prohibition: no state or local government may impose any voting rule that results in the denial or restriction of the right to vote based on race or color. A violation is established when, based on the totality of circumstances, the political process is not “equally open” to members of a protected class and they have “less opportunity than other members of the electorate to participate.”14Office of the Law Revision Counsel. 52 USC 10301 – Denial or Abridgement of Right to Vote on Account of Race or Color Both the federal government and private plaintiffs can sue under Section 2.
Where Enforcement Stands Now
Preclearance worked for decades, but it depended on a coverage formula in Section 4 that identified which jurisdictions had to seek federal approval. In Shelby County v. Holder (2013), the Supreme Court struck that formula down. The Court reasoned that it rested on 40-year-old data about turnout and registration that no longer reflected current conditions, and that Congress could not single out specific states without a basis grounded in present-day reality.15Justia U.S. Supreme Court Center. Shelby County v. Holder, 570 U.S. 529 (2013)
The practical effect was immediate. Nine states that had been fully covered, including Alabama, Georgia, Louisiana, Mississippi, South Carolina, Texas, and Virginia, no longer needed preclearance to change their voting rules.16Department of Justice. Jurisdictions Previously Covered by Section 5 The Court did not strike down Section 5 itself, only the formula that gave it teeth. Congress could pass a new formula. None has been enacted.17Department of Justice. About Section 5 of the Voting Rights Act
Section 2 became the primary tool for challenging discriminatory voting laws. Then in Brnovich v. Democratic National Committee (2021), the Supreme Court raised the bar for Section 2 claims. Not every racial disparity in the impact of a voting rule amounts to a violation, the Court held. It set out several guideposts: the “usual burdens of voting” are permissible, rules with long historical use carry more weight, and courts must evaluate a state’s entire voting system rather than isolating one restriction. The Court also emphasized that states have a strong legitimate interest in preventing election fraud. Together, Shelby County and Brnovich shifted federal voting rights enforcement from preventive oversight toward after-the-fact litigation.
Criminal and Civil Penalties
Federal law backs the 15th Amendment with criminal penalties independent of the Voting Rights Act. Under 18 U.S.C. § 241, anyone who conspires to intimidate or threaten a person for exercising a constitutional right, including the right to vote, faces up to 10 years in federal prison. If the conspiracy results in death, the penalty can include life imprisonment or the death penalty.18Office of the Law Revision Counsel. 18 USC 241 – Conspiracy Against Rights Unlike most federal conspiracy charges, conviction does not require proof of an overt act beyond the agreement itself.
A separate statute, 18 U.S.C. § 594, targets voter intimidation at the polls. Anyone who threatens or coerces another person to interfere with their right to vote, or to influence their choice of candidate in a federal election, can be fined or imprisoned for up to one year.19Office of the Law Revision Counsel. 18 USC 594 – Intimidation of Voters On the civil side, 42 U.S.C. § 1983 lets individuals sue state officials who violate their constitutional rights while acting in their official capacity, which includes rights guaranteed by the 15th Amendment. Even if the Voting Rights Act were narrowed further, the constitutional guarantee and these enforcement statutes remain in force.