OCTOBER TERM, 1960.
Opinion of the Court.
364 U. S.
The respondents find another barrier to the trial of this
case in Colegrove v. Green, 328 U. S. 549. In that case
the Court passed on an Illinois law governing the arrangement of congressional districts within that State. The
complaint rested upon the disparity of population between
the different districts which rendered the effectiveness of
each individual's vote in some districts far less than in
others. This disparity came to pass solely through shifts
in population between 1901, when Illinois organized its
congressional districts, and 1946, when the complaint was
lodged.. During this entire period elections were held
under the districting scheme devised in 1901. The Court
affirmed the dismissal of the complaint on the ground that
it presented a subject not meet for adjudication.* The
decisive facts in this case, which at this -stage must be
taken as proved, are wholly different from the considera,tions found controlling in Colegrove.
That case involved a complaint of discriminatory
apportionment f congressional districts. The appellants
in Colegrove complained only of a dilution of the strength
of their votes as a result of legislative inaction over a
course of many years. The petitioners here complain
that affirmative legislative action deprives them of their
votes and the consequent advantages that the ballot
affords. When a legislature thus singles out a readily
isolated segment of a racial minority for special discriminatory treatment, it violates the Fifteenth Amendment.
In no. case involving unequal weight in voting distribution
that has come before the Court did the decision sanction a
differentiation on racial lines whereby approval was given
to unequivocal withdrawa] of the vote solely from colored
citizens. Apart from all else, these considerations lift this
*Soon after the decision in the Colegrove case, Governor Dwight H.
Green of Illinois in his 1947 biennial message to the legislature recommended a reapportionment. The legislature immediately responded,
Ill. Sess. Laws 1947, p. 879, and in 1951 redistricted again. Ill. Sess.
Laws 1951, p. 1924.