Gill v. Whitford
The Supreme Court ruled that a group of Wisconsin Democratic voters had not shown they had the legal right to sue over the state's redistricting map, because they relied on statewide statistics instead of proving that their own individual districts were manipulated to weaken their votes.
The decision sidesteps the bigger question of whether courts can police partisan gerrymandering at all, but it makes clear that voters challenging a map on a vote-dilution theory must show harm to their own district, not just harm to their party's fortunes statewide.
“the harm asserted by the plaintiffs is best understood as arising from a burden on those plaintiffs’ own votes”
The Court's core reasoning that gerrymandering injury must be tied to a voter's own district.
How it got here: A three-judge federal district court denied dismissal, ruled the map an unconstitutional gerrymander after trial, and the state officials appealed directly to the Supreme Court.
The Case in Depth
What happened
Wisconsin's Republican-controlled legislature drew a new legislative map, Act 43, after the 2010 census. Twelve Democratic voters sued, claiming the map "cracked" some Democratic voters across districts and "packed" others into a few districts, weakening Democrats' ability statewide to turn votes into legislative seats, in violation of the First and Fourteenth Amendments.
The question before the Court
Could a group of Democratic voters challenge Wisconsin's statewide election map as an illegal partisan gerrymander without showing that their own individual voting districts were harmed?
The Court's answer
No — not on the record they built. The Court ruled that these Wisconsin Democratic voters had not proven they had the right to sue, because their case rested on statewide statistics about how the map affected the Democratic Party's overall fortunes, rather than on evidence that each plaintiff's own district had been "packed" or "cracked" in a way that weakened that particular voter's ballot.
The Court explained that the right to vote is personal, so a lawsuit claiming vote dilution must show a burden on the plaintiff's own vote — not just a shared political disappointment. Four plaintiffs had claimed in their complaint that they lived in manipulated districts but never followed through with proof at trial, so the case is being sent back to give them a chance to try again.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
Voters who want to challenge a gerrymandered map in federal court on a vote-dilution theory now know they must show they personally live in a district that was packed or cracked, not just point to statewide statistics like the "efficiency gap." This raises the evidentiary bar for future gerrymandering lawsuits and sends this closely watched case back for more litigation rather than a final ruling on partisan gerrymandering.
What changes now
The case goes back to the federal trial court so the plaintiffs can try to prove standing by showing their own districts were packed or cracked, using evidence like alternative maps. If they succeed, the case can proceed to the merits of whether Act 43 is an unconstitutional gerrymander. The Court left open whether a different, associational First Amendment theory could support a statewide claim, and it did not decide whether partisan-gerrymandering claims are even the kind of thing courts can resolve.
What this does not decide
The Court did not decide whether partisan gerrymandering claims are the kind of legal dispute courts are allowed to resolve at all, and it did not rule on the merits of whether Wisconsin's map was actually an unconstitutional gerrymander. It also left open whether a separate First Amendment associational-injury theory might support a statewide claim without district-specific proof.
Concurrences and dissents
Concurrence — Justice Kagan
Justice Kagan agreed the plaintiffs failed to prove standing under a vote-dilution theory but wrote to explain what evidence would work on remand, including alternative maps. She argued that a separate First Amendment associational-injury theory, if the plaintiffs pursue it, would not require proving harm to their own district because the injury to a political party's ability to organize is inherently statewide.
Concurrence in part — Justice Thomas
Justice Thomas agreed the plaintiffs lacked standing but objected to sending the case back for another chance to prove it. He argued the Court's usual practice is to order dismissal outright once standing fails, and that after a year and a half of litigation and a four-day trial, the plaintiffs already had ample opportunity to prove standing and simply failed.
How the Court got there
The legal reasoning, step by step
- The Court applied the standard three-part test for Article III standing — injury in fact, caused by the defendant, and fixable by a court — focusing on whether the voters showed a concrete and particularized injury, meaning one that affects them personally rather than just as members of a group.
- The Court explained that the right to vote is individual and personal, so a partisan-gerrymandering claim based on vote dilution requires showing that the voter's own district was 'packed' (loaded with extra supporters of one party) or 'cracked' (spread thin so their preferred candidate cannot win), since that is what determines whether a particular voter's ballot carries less weight.
- The Court distinguished this case from earlier one-person, one-vote cases like Baker v. Carr and Reynolds v. Sims, explaining that those cases produced statewide remedies only because fixing an individual voter's diluted vote required redrawing the whole map — not because the underlying injury itself was collective rather than personal.
- Applying that framework, the Court found that four plaintiffs had alleged living in packed or cracked districts in their complaint but never offered trial evidence to back that up, while all the plaintiffs relied mainly on statewide efficiency-gap statistics measuring effects on political parties rather than on any single voter's own ballot.
- Because none of the evidence tied a concrete injury to a specific plaintiff's own district, the Court concluded the plaintiffs had not carried their burden to prove the personal, particularized injury that Article III standing requires.
Doctrinal impact
Cases affected by this decision
Reaffirms Baker v. Carr (369 U. S. 186)
The Court relied on Baker's rule that voters must show personal disadvantage, not just a generalized grievance, to sue.
Reaffirms United States v. Hays (515 U. S. 737)
The Court applied Hays's rule that gerrymandering plaintiffs can only challenge their own district, not the whole map.