Summary

Portrait of William O. Douglas William O. Douglas Gray v. Sanders — Opinion of the Court

How then can one person be given twice or 10 times the voting power of another person in a statewide election merely because he lives in a rural area or because he lives in the smallest rural county? Once the geographical unit for which a representative is to be chosen is designated, all who participate in the election are to have an equal vote-whatever their race, whatever their sex, whatever their occupation, whatever their income, and wherever their home may be in that geographical unit.
Source: Wikisource

Portrait of William O. Douglas William O. Douglas Gray v. Sanders — Opinion of the Court

Every voter's vote is entitled to be counted once. It must be correctly counted and reported. As stated in United States v. Mosley, 238 U.S. 383, 386, 35 S.Ct. 904, 905, 59 L.Ed. 1355, 'the right to have one's vote counted' has the same dignity as 'the right to put a ballot in a box.' It can be protected from the diluting effect of illegal ballots.
Source: Wikisource

Portrait of William O. Douglas William O. Douglas Gray v. Sanders — Opinion of the Court

But we need not determine all the limitations that are placed on this power of a State to determine the qualifications of voters, for appellee, is a qualified voter.
The Fifteenth Amendment prohibits a State from denying or abridging a Negro's right to vote. The Nineteenth Amendment does the same for women. If a State in a statewide election weighted the male vote more heavily than the female vote or the white vote more heavily than the Negro vote, none could successfully contend that that discrimination was allowable.
Source: Wikisource

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