How has the US Supreme Court interpreted the principle that a vote is worth more in one district than in another?

The court held in Wesberry v. Sanders, 376 U.S. 1, 84 S.Ct. 526, 11 L.Ed.2d 481: "We do not believe that the Framers of the Constitution intended to permit the same vote-diluting discrimination to be accomplished through the device of districts containing widely varied numbers of inhabitants. To say that a vote is worth more in one district than in another would * * * run counter to our fundamental ideas of democratic government. * * *" 376 U.S. 1, at 8, 84 S. Ct. 526, at 531. Thus the court held in Reynolds v. Sims, supra, that population is the central point for determination and the main basis for judgment in legislative apportionment controversies.

[241 F. Supp. 582]

Then Chief Justice Warren, writing for the majority held: