Whether the federal district court had subject-matter jurisdiction over the voters' Fourteenth Amendment challenge to Tennessee's legislative apportionment statute.
Holding
Yes. The complaint arose under the Federal Constitution and fell within the district court's civil-rights jurisdiction.
Reasoning
Article III extends federal judicial power to cases arising under the Constitution, and the voters expressly alleged that state action denied them equal protection under the Fourteenth Amendment. That allegation was neither frivolous nor so insubstantial that it could be dismissed for want of subject-matter jurisdiction.
Congress granted district courts jurisdiction under 28 U.S.C. § 1343(3) to redress deprivations, under color of state law, of rights secured by the Constitution. Section 1983 likewise supplied a cause of action for the alleged constitutional deprivation.
The Court separated jurisdiction from the merits. Even if the complaint ultimately failed to prove an equal-protection violation, a failure to state a valid claim would call for a merits disposition, not a finding that the court lacked power to hear a plainly federal controversy. Earlier voting-rights and redistricting cases confirmed that federal courts may exercise jurisdiction over constitutional challenges involving election arrangements.