“ It would be strange indeed, and doctrinaire, for this Court, applying such broad constitutional concepts as due process and equal protection of the laws, to deny a State the power to assure a proper diffusion of political initiative 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 Constitution a practical instrument of government-makes no such demands on the States. ”

“ Illinois is one of the more populous states. Millions of ballots will be required, not only in the state but in Cook County alone. It is true that, on the short record before us and in the necessarily brief time available for preparing both the record and the briefs, appellees who oppose granting the relief have not made an absolutely conclusive factual showing that new ballots, containing the names of appellants' candidates, could not possibly be printed and distributed for use at the election. ”

“ Even if we assume that appellants' constitutional rights have been violated, the questions arise whether, in those circumstances, the equity arm of the federal courts can now be extended to give effective relief; and whether the relief, if given, might not do more harm than good, might not indeed either disrupt the Illinois election altogether or disfranchise more persons than have been disfranchised by the application of the questioned Illinois procedures. ”