Potter Stewart

“ Green, 335 U.S. 281, the Court held that the Equal Protection Clause does not
deny a State the power to assure a proper diffusion of political initiative [p266] as between its thinly populated counties and those having concentrated masses, in view of the fact that the latter have practical opportunities for exerting their political weight at the polls not available to the former. ”

“ The District Court did not reach the merits of that claim, and this Court quite properly expresses no view on the subject. Contrary to the suggestion of my Brother HARLAN, the Court does not say or imply that "state legislatures must be so structured as to reflect with approximate equality the voice of every voter." Post, p. 332. The Court does not say or imply that there is anything in the Federal Constitution
to prevent a State, acting not irrationally, from choosing any electoral legislative structure it thinks best suited to the interests, temper, and customs of its people. ”