New Jersey Asks Supreme Court to Settle Prediction Markets Fight

New Jersey has asked the U.S. Supreme Court to decide whether states retain the power to police sports wagering offered through federally regulated prediction markets, a question that tribal governments have spent most of 2026 arguing is existential for the tribal gaming economy. State Attorney General Jennifer Davenport filed the petition on September 2, asking the justices to resolve a split between two federal appeals courts that have reached opposite conclusions about the reach of the Commodity Exchange Act.

The petition arrives at a moment of unusual alignment across an industry that rarely speaks with one voice. Davenport's filing notes that 44 states, hundreds of tribal gaming interests, and commercial casino operators have opposed the legal theory advanced by Kalshi and its competitors: that sports event contracts are swaps under the exclusive jurisdiction of the Commodity Futures Trading Commission, and therefore beyond the reach of state gaming regulators. For tribes, the stakes run deeper than market share. If prediction markets can offer what functions as sports betting in every state without a license, the exclusivity provisions that anchor tribal-state compacts lose much of their commercial meaning.

How the circuit split formed

The Third Circuit ruled 2-1 in May in Kalshi's favor, upholding a preliminary injunction that had blocked New Jersey's March 2025 cease-and-desist order. The majority accepted the swaps characterization and found that federal commodities law displaced the state's authority over the contracts at issue. That decision became the high-water mark for the prediction market industry's preemption argument.

The Ninth Circuit went the other way. On August 28, a panel affirmed in substantial part a district court order dissolving Kalshi's preliminary injunction against Nevada's gaming regulators, declining to read the Commodity Exchange Act as a wholesale displacement of state gambling law. The panel's reasoning gave states and tribes their most durable appellate authority to date, and it is the reason the question is now framed for the Supreme Court as a conflict rather than a novelty. Our analysis of the Ninth Circuit ruling examined how the panel treated the tribal amicus arguments.

A cert petition is not a ruling, and the Court grants a small fraction of what it receives. But a genuine and acknowledged circuit split on a federal preemption question, with dozens of state attorneys general on one side, is the classic profile of a case the justices take. The Court could act on the petition this fall.

What tribes have argued, and what they have not

Tribal governments have generally avoided arguing that prediction markets are unlawful in every application. The narrower and more consistent tribal position has been that the Indian Gaming Regulatory Act establishes a comprehensive federal framework for gaming on Indian lands, that Class III gaming is authorized through negotiated tribal-state compacts, and that a federal commodities regulator cannot silently rewrite that arrangement by reclassifying a wager as a financial instrument. That framing matters because it keeps the dispute inside familiar preemption doctrine rather than asking courts to make policy judgments about whether event contracts are socially desirable.

The economic argument has been made separately, mostly to Congress rather than to courts. Tribal leaders told a Senate Committee on Indian Affairs roundtable in August that the revenue at risk is not corporate profit but government revenue, funding schools, clinics, housing, and public safety in communities that have few alternative tax bases. The National Indian Gaming Commission reported record industry-wide gross gaming revenue of $46.2 billion for fiscal 2025, and tribal governments have been consistent that the money is spent under the allocation rules IGRA imposes, not distributed as dividends.

The question the Court is being asked is narrow and jurisdictional. The consequences, for tribes, are structural: whether a compact negotiated with a state still describes the competitive environment the tribe agreed to.

The parallel tracks

Litigation is only one of three fronts. The second is Congress, where tribal advocates have pressed for language clarifying that federal market-structure legislation does not preempt IGRA or state gaming law. The Indian Gaming Association's summer legislative push in Washington focused on exactly that, seeking amendments that would foreclose casino-style and sports gambling through event contracts. The third is the CFTC itself, which retains rulemaking authority over the contracts and has faced sustained tribal comment arguing that its own approval processes failed to account for tribal sovereignty.

Those tracks interact. A grant of certiorari would likely slow congressional urgency, since lawmakers rarely legislate into a pending Supreme Court case. A denial would leave the circuit split intact and make the geographic patchwork worse, with the same product lawful in one federal circuit and enjoinable in another. Tribal operators planning 2027 budgets are being asked to model both.

What to watch between now and a decision

Three things will shape the next several months. First, whether the Solicitor General is invited to weigh in, which would add time but also signal seriousness. Second, whether other states file supporting briefs; the breadth of that coalition was central to New Jersey's framing, and tribal organizations are expected to appear as amici as they have at every prior stage. Third, whether prediction market operators adjust their offerings voluntarily in states where enforcement risk is now concentrated, which would reduce the practical stakes without resolving the legal question.

For tribal enterprises, the operational posture has not changed much. Sportsbook programs continue to be run primarily as retention and cross-sell tools rather than as standalone profit centers, which limits direct exposure. The larger exposure is to the precedent: a ruling that federal financial regulation can override compacted exclusivity would not stop at sports. Readers new to how exclusivity is negotiated and what it actually guarantees can start with our legal guide to IGRA and Class III gaming, and our earlier coverage of how prediction markets intersect with IGRA exclusivity lays out the doctrinal argument in more detail.

Nothing about the petition changes the law today. Kalshi and its competitors remain enjoined in some jurisdictions and operating in others, and tribal regulators continue to enforce compact terms within their own jurisdictions. But after eighteen months in which every development was incremental, the industry now has a single forum in which the question could be answered for the whole country.