AP® United States Government and Politics · Unit 2 · Topic 2.10
How a Case Reaches the Supreme Court
A case reaches the Supreme Court by climbing through lower courts and then surviving a highly selective petition process called certiorari, which the Court grants to only a tiny fraction of cases, usually to resolve a split among circuit courts.
Most cases start in a federal district court or a state trial court. The losing party can appeal to a circuit court of appeals (or a state appellate court), which reviews the record for legal errors rather than retrying facts. Losing there still doesn't guarantee a hearing higher up. The party can file a petition for a writ of certiorari, asking the Supreme Court to take the case. Out of roughly 7,000 petitions filed each year, the Court grants cert to about 60 to 80. Losing an appeal just buys you the right to ask; it is not an entitlement to review.
The rule of four governs the grant. Each petition is circulated among the nine justices, and it takes only four votes, not a majority, to grant cert. Justices look for cases that raise a significant, unsettled federal legal question, not ones where they merely dislike the lower court's outcome. The single strongest signal is a circuit split: when two or more circuit courts of appeals have interpreted the same federal law or constitutional provision differently, letting that stand means the law means one thing in Ohio and another in Texas. Resolving that inconsistency into one national rule is a core reason the Court exists.
Once cert is granted, the case moves through briefing, oral argument, a private conference where justices discuss and take a preliminary vote, and opinion assignment, usually by the senior justice in the majority. Months of drafting and circulating opinions follow before the decision is announced. This gatekeeping step connects directly to the Court's broader role in Unit 2: it is one of the few veto points where the judiciary chooses, almost entirely at its own discretion, which conflicts between Congress, the president, the states, or private parties actually get resolved nationally.
Key terms
- Writ of certiorari
- An order by the Supreme Court agreeing to review a lower court's decision.
- Rule of four
- The practice that it takes only four of nine justices' votes to grant certiorari to a case.
- Circuit split
- A situation where two or more federal circuit courts of appeals reach different conclusions on the same legal question.
- Opinion assignment
- The process of deciding which justice will write the Court's official opinion, usually done by the senior justice in the majority.
- Conference
- The private meeting where justices discuss a case and cast a preliminary vote after oral argument.
Watch it explained
- How it worksWalk me through a case climbing from a district court to a circuit court to the Supreme Court.
- How it worksHow does the rule of four decide which petitions get granted certiorari?
- Worked exampleTrace one case through oral argument, conference, opinion assignment, and the announced decision.
- Common mistakeWhy isn't losing an appeal a guarantee that the Supreme Court will take a look?
- How it worksHow does a circuit split make the Court far more likely to grant a case?
Check yourself
End of topic.