The U.S. Supreme Court hands down its decision in Guinn v. United States 238 US 347 1915, striking down Oklahoma grandfather clause legislation which had the effect of denying the right to vote to blacks.
Guinn v. United States, 238 U.S. 347 (1915), was a United States Supreme Court decision that found certain grandfather clause exemptions to literacy tests for voting rights to be unconstitutional. Though these grandfather clauses were superficially race-neutral, they were designed to protect the voting rights of illiterate white voters while disenfranchising black voters.
The 1870 ratification of the Fifteenth Amendment to the United States Constitution barred each state from denying the right to vote on the basis of "race, color, or previous condition of servitude". In response, several Southern states, including Oklahoma, established constitutional provisions designed to effectively disenfranchise African-American voters without explicitly violating the Fifteenth Amendment. In his majority opinion, Chief Justice Edward Douglass White held that Oklahoma's grandfather clause was "repugnant to the Fifteenth Amendment and therefore null and void". The decision had little immediate impact, as Southern legislatures found other methods to disenfranchise blacks.
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