Answer: The case was a victory for the NAACP because it overturned a law that would have limited African American voting rights.
Explanation:
Guinn v. United States (1915), which had already been argued before the Court in 1913, called out the unconstitutionality of grandfather clause exemptions to literacy tests for voting rights because they had been specially created to guard the voting rights of illiterate white voters and disenfranchise African-American voters.
It was a great victory for the National Association for the Advancement of Colored People (NAACP), who had actively participated in the case.
