New Jersey Appeals to US Supreme Court to Challenge Prediction Markets' Sports Betting Jurisdiction

New Jersey has reignited a high-stakes legal battle over the boundaries of sports betting regulation by petitioning the US Supreme Court to review the jurisdictional conflict between state gambling laws and federally regulated prediction markets. This move comes exactly eight years after the state successfully championed the Supreme Court case that struck down the Professional and Amateur Sports Protection Act (PASPA), opening the floodgates for legal sports betting nationwide. The current challenge represents the next major frontier in gambling regulation, pitting state sovereignty against federal financial market oversight.

The Core Legal Conflict

At the heart of New Jersey's petition is whether the 2010 Dodd-Frank Wall Street Reform and Consumer Protection Act effectively stripped states of their authority to regulate sports betting when such wagers are offered through Commodity Futures Trading Commission (CFTC)-registered prediction markets. Attorney General Jennifer Davenport's office filed the writ of certiorari following a 2-1 ruling by the Third Circuit Court of Appeals in April that favored prediction markets. The state had until Thursday to appeal that decision to the nation's highest court.

The legal filing directly challenges the business model of platforms like Kalshi, which position their sports event contracts as financial derivatives rather than traditional sports wagers. New Jersey's petition argues that allowing such markets to operate under exclusive CFTC jurisdiction would create an end-run around state gambling regulations that were specifically affirmed in the Supreme Court's 2018 PASPA decision.

Growing Circuit Court Split

The likelihood of Supreme Court review increased substantially following an August 28 decision by the Ninth Circuit Court of Appeals that reached the opposite conclusion of the Third Circuit's ruling. In that case, a unanimous three-judge panel sided with Nevada's regulatory authority, creating the type of circuit court split that often prompts Supreme Court intervention. This judicial divide sets up precisely the kind of federalism question that typically attracts the justices' attention.

New Jersey's petition strategically references the court's own PASPA ruling, stating: "Just eight years ago, this court reiterated that 'each state is free to act on its own' in regulating sports betting." The filing directly contrasts this with Kalshi's position, noting the platform bills itself as offering "the first app for legal sports betting in all 50 states" while allegedly ignoring individual state gambling laws.

Prediction Markets Push Back

Kalshi has mounted a vigorous defense of its regulatory framework, maintaining that its event contracts qualify as financial instruments properly overseen by the CFTC. Company spokesperson Dani Lever emphasized this position in a statement to CDC Gaming, asserting: "Both the Third Circuit and the District of New Jersey side with Kalshi, because the CFTC's exclusive jurisdiction preempts state law." Lever added that nothing in New Jersey's Supreme Court filing changes their view that a single national regulator is necessary for their exchange model to function effectively.

This argument reflects the fundamental tension between the localized nature of traditional gambling regulation and the national scope of financial market oversight. The CFTC under Chairman Michael Selig has taken an increasingly assertive stance in protecting its regulatory turf, including filing lawsuits against nine states and issuing emergency orders to counter state-level restrictions on prediction markets.

Billions in Economic Stakes

The financial implications of this jurisdictional battle are enormous. Traditional commercial sports betting generated just under $17 billion in nationwide revenue in 2025, while Kalshi and Polymarket alone recorded more than $45 billion in trading volume during August 2023. Though not directly comparable to betting revenue (as trading volume includes the total value of all contracts bought and sold), these figures demonstrate the massive scale of prediction market activity.

The American Gaming Association estimates that these exchanges have diverted more than $1.3 billion in potential state tax revenue that would have gone to regulated sportsbooks. This revenue loss has galvanized state gaming regulators and commercial operators alike, with former New Jersey governor Chris Christie emerging as a prominent voice against prediction markets through his work with the AGA.

Regulatory Philosophy Clash

The conflict extends beyond dollars and cents to fundamental questions about innovation and regulatory authority. CFTC Chairman Selig articulated his vision during a recent Innovation Advisory Committee meeting that brought together leaders from Kalshi, Polymarket, DraftKings and traditional financial institutions: "It's not a question of whether innovations like blockchain, artificial intelligence, and prediction markets will transform our markets. It's a question of where this innovation will take place and who will write the rules."

This perspective contrasts sharply with state regulators who view prediction markets as gambling products masquerading as financial instruments to evade stricter oversight. The CFTC's current rulemaking process regarding prediction markets has drawn criticism from some quarters as potentially designed to strengthen the agency's position ahead of possible Supreme Court review.

Supreme Court Considerations

The Supreme Court's new term begins on October 2, with the justices typically granting review to about 80 of the 7,000-8,000 petitions they receive annually. Five current members of the court - Chief Justice John Roberts and Justices Clarence Thomas, Samuel Alito, Elena Kagan, and Sonia Sotomayor - participated in the landmark 2018 PASPA decision, providing some institutional memory on sports betting issues.

While no prediction market contracts currently exist on Kalshi regarding this Supreme Court case, competing platform Polymarket lists a 41% probability that the justices will accept a prediction markets-related case by December 31. This assessment reflects both the substantive importance of the issues and the procedural advantage created by the circuit split.

Broader Industry Implications

The case represents the most significant legal development in sports betting since PASPA's repeal, with potential ramifications extending far beyond New Jersey. The outcome could determine whether prediction markets continue their rapid expansion or face new constraints from state regulators. Major sportsbook operators have already begun positioning themselves in the prediction space through various partnerships and acquisitions, recognizing the transformative potential of these platforms.

Political prediction markets gained particular prominence during the 2024 US presidential election cycle, bringing these platforms into mainstream financial and political discourse. Their continued growth - with Kalshi now valued at $40 billion and Polymarket at $21 billion - ensures this Supreme Court petition represents just one battle in what promises to be an extended regulatory and legal conflict over the future of event-based trading in the United States.