Judicial branch · Landmark case
Baker v. Carr
369 U.S. 186 (1962) · Opinion of the Court
What you should know
This page explains the Court’s holding in plain language.
The controlling document is the Court’s opinion. Baker opened the door; Reynolds v. Sims supplied the equal-population rule.
The Court held that federal courts may hear constitutional challenges to state legislative apportionment. Such claims are not nonjusticiable political questions. The Equal Protection Clause provides judicially manageable standards for resolving malapportionment claims, and the guarantee of a republican form of government does not make the issue exclusively political.
Background
Tennessee had not redistricted its legislature since 1901 despite major population shifts. Urban voters alleged that the resulting malapportionment diluted their votes in violation of equal protection. Lower courts had treated such claims as political questions. The Supreme Court reversed and remanded for adjudication on the merits.
Baker is the key that unlocked “one person, one vote.” By holding apportionment justiciable, it enabled Reynolds v.
Sims and the wave of redistricting litigation that reshaped state legislatures and congressional districts. It remains a foundational justiciability and voting-rights case.
Vote and authorship
| Majority | Brennan, J. |
|---|---|
| Join | Warren, C.J., Black, Douglas, Clark, Stewart |
| Concurrence | Douglas, J.; Clark, J.; Stewart, J. |
| Dissent | Frankfurter, J. (joined by Harlan); Harlan, J. |
| Not participating | Whittaker, J. |
The mere fact that the suit seeks protection of a political right does not mean it presents a political question.
Justice Brennan · Baker v. Carr
How it fits in government
Judicial branch
Expands justiciability into legislative apportionment.
Voting rights
Enables judicial enforcement of equal-population principles.
State & local government
Subjects state legislative maps to federal constitutional review.