The last justiciability doctrine concerns not the plaintiff or the timing but the question itself. Some questions, even when properly brought, are for the political branches to answer. They are political questions, and the doctrine is narrower than its name suggests. It builds on ripeness and mootness.
Key idea
Courts decline questions that the Constitution commits to another branch or that lack judicially manageable standards. Baker v. Carr (1962) listed the factors. Examples include Senate impeachment trials (Nixon v. United States, 1993) and partisan gerrymandering claims in federal court (Rucho v. Common Cause, 2019).
- a textually demonstrable commitment of the issue to another branch;
- a lack of judicially discoverable and manageable standards for resolving it;
- the impossibility of deciding without an initial policy determination of a kind for nonjudicial discretion;
- the impossibility of deciding without expressing lack of the respect due the other branches;
- an unusual need for unquestioning adherence to a political decision already made;
- the potential for embarrassment from conflicting statements by different branches.
Why it works
The doctrine follows from the separation of powers. Some decisions belong to Congress or the President by the Constitution's design, and some questions cannot be decided by legal rules at all. In Luther v. Borden (1849) the Court left to Congress and the President the question of which of two rival governments of Rhode Island was legitimate. But in Baker v. Carr (6–2), the Court held that a challenge to badly unequal state legislative districts under the Equal Protection Clause was justiciable, leading to "one person, one vote." In Powell v. McCormack (1969) it decided whether the House could exclude a member-elect who met the Constitution's qualifications. In Nixon v. United States, a federal judge removed by the Senate argued that letting a committee hear the evidence was not a proper "trial"; the Court held that the Constitution gives the Senate the "sole Power to try" impeachments. In Rucho (5–4), the majority held that no judicially manageable standard exists for deciding how much partisanship in districting is too much; the dissent argued that courts could apply standards like those used by lower courts.
Worked example: Political question or not?
A citizen sues, claiming her state's legislative districts are so unequal in population that her vote counts a fifth as much as others'. Is this a political question?
- Baker v. Carr held such equal protection claims are justiciable.
- Population equality is a manageable standard: count the people.
Answer: No. Courts decide malapportionment claims.
Worked example: Another one
A voter sues in federal court, claiming her state's congressional map was drawn to favor one party too much. After Rucho, can a federal court decide the claim?
- Rucho held partisan gerrymandering claims present political questions beyond the reach of federal courts.
- State courts, applying state constitutions or statutes, and Congress may still act.
Answer: No, not in federal court; state law and Congress remain possible routes.
Common mistake
Thinking any case about politics is a political question. Many politically charged cases are decided: elections, districting by population, the House's exclusion of a member, even a President's claims of privilege. The doctrine is narrow and turns on the Baker factors. Check: does the Constitution give this decision to another branch, or are there no legal standards to apply? If neither, the court will decide.
This is an educational course, not legal advice.