New Jersey Challenges Prediction Markets in Supreme Court Petition, Echoing Historic PASPA Battle

New Jersey has initiated a legal battle that could redefine the regulatory landscape for prediction markets, filing a petition with the US Supreme Court to resolve whether states can enforce sports betting laws against CFTC-registered prediction exchanges. This action comes just eight years after the state successfully challenged the Professional and Amateur Sports Protection Act (PASPA) before the same court, a landmark decision that legalized sports betting across the United States. The new petition marks New Jersey's latest effort to assert state authority over gambling activities within its borders.

The Legal Challenge Explained

On Wednesday, New Jersey Attorney General Jennifer Davenport formally filed a petition for writ of certiorari with the Supreme Court, seeking review of an April 2024 Third Circuit Court of Appeals ruling that favored prediction market operator Kalshi. The 2-1 appellate decision found that the Commodity Futures Trading Commission (CFTC) holds exclusive jurisdiction over prediction markets registered with the federal agency. The case fundamentally questions whether the 2010 Dodd-Frank Wall Street Reform and Consumer Protection Act prevents states from regulating sports bets that occur on CFTC-regulated markets.

New Jersey contends that these event contracts constitute illegal sports betting under state law, while operators maintain they are legitimate financial derivatives. The state's petition directly challenges Kalshi's claim to offer legal sports betting nationwide without complying with individual state gambling regulations. Davenport emphasized this point in her statement: "We're calling on the Supreme Court to resolve this issue and recognise that Congress did not silently make the sports-betting industry immune from state law."

Circuit Split Increases Supreme Court Odds

The likelihood of Supreme Court review significantly increased following a 28 August Ninth Circuit Court of Appeals ruling that created a direct conflict with the Third Circuit's decision. The Ninth Circuit panel unanimously sided with Nevada's regulatory authority over prediction markets, establishing what legal experts call a "circuit split" - a key factor the Supreme Court considers when selecting cases. This judicial division mirrors the circumstances that led to the Court taking up the PASPA case in 2018.

New Jersey's petition strategically references the PASPA precedent, quoting from the Court's 2018 decision: "Just eight years ago, this court reiterated that 'each state is free to act on its own' in regulating sports betting." The document contrasts this principle with Kalshi's position, noting the company bills itself as offering legal sports betting in all 50 states while allegedly disregarding state gambling laws. This framing positions the case as a continuation of the federalism debate central to the PASPA litigation.

Financial Stakes and Industry Impact

The economic implications of this legal battle are substantial for both states and the gambling industry. Commercial sports betting generated nearly $17 billion in nationwide revenue in 2025, while prediction markets Kalshi and Polymarket reported combined trading volume exceeding $45 billion in August 2024 alone. Though trading volume doesn't equate directly to betting revenue, these figures demonstrate the massive scale of prediction market activity. The American Gaming Association estimates states have lost more than $1.3 billion in potential tax revenue to these platforms.

Former New Jersey Governor Chris Christie, who championed the PASPA case to the Supreme Court, now leads the AGA's opposition to prediction markets. His involvement underscores the continuity between these legal battles and highlights how the gambling industry views prediction markets as both competition and a regulatory challenge. The AGA's position reflects concerns that prediction markets could undermine the state-regulated sports betting framework established after PASPA's repeal.

Regulatory Divisions and Federalism Debate

The conflict highlights growing tensions between state gambling regulators and federal financial authorities. The CFTC under the current administration has actively supported prediction markets, approving event contracts that many states consider sports wagers by another name. This stance represents a reversal from previous administrations that rejected such markets. CFTC Chairman Michael Selig has become a vocal defender of prediction markets as legitimate financial instruments, stating during a 20 August Innovation Advisory Committee meeting: "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."

Meanwhile, the CFTC has taken unprecedented steps to protect its licensees, including filing lawsuits against nine states and issuing emergency orders to block state enforcement actions. These interventions have created a complex web of overlapping jurisdictions, with Kalshi forced to limit trading in multiple states including Nevada. The situation has left operators, regulators and consumers handling an uncertain legal landscape where the same activity may be considered legal financial trading under federal law but illegal gambling under state statutes.

Market Growth and Political Context

Prediction markets have experienced explosive growth since gaining mainstream attention during the 2024 U.S. presidential elections. Kalshi and Polymarket have seen their valuations reach $40 billion and $21 billion respectively, while traditional sportsbooks have rushed to establish their own prediction platforms through acquisitions, partnerships, or internal development. This rapid expansion has occurred despite ongoing legal uncertainties, with operators apparently betting that federal oversight will ultimately prevail over state objections.

The markets' growth trajectory shows some volatility, with August 2024 trading volume declining 15% from July levels, which analysts attribute to the conclusion of the FIFA World Cup tournament. However, the overall trend points toward increasing adoption and market penetration. This commercial success has intensified regulatory concerns, particularly among states that have invested heavily in building legal sports betting markets since PASPA's repeal.

What Comes Next

The Supreme Court receives approximately 7,000-8,000 writ petitions annually but typically grants review to only about 80 cases. Four of the nine justices must vote to accept a case, with five current members - Chief Justice John Roberts and Justices Clarence Thomas, Samuel Alito, Elena Kagan and Sonia Sotomayor - having participated in the PASPA decision. This continuity on the bench could influence how the Court views New Jersey's latest challenge.

Prediction market Polymarket currently assigns a 41% probability that the Court will accept an event contract case by 31 December 2024. If the justices agree to hear the matter, their eventual ruling could fundamentally reshape the relationship between state gambling laws and federal financial regulations, potentially determining whether prediction markets operate as a parallel system to state-licensed sportsbooks or become subject to the same regulatory framework.

Broader Implications for Gambling Regulation

The case represents perhaps the most significant development in sports betting regulation since the PASPA decision. It has united diverse gaming stakeholders - including commercial operators, tribal gaming interests, state regulators and legislators - in seeking clarity on prediction markets' legal status. The outcome could establish precedent affecting not just sports-related event contracts but potentially other forms of financialized gambling products.

As with the PASPA litigation, this matter ultimately revolves around fundamental questions of federalism and states' rights. The Supreme Court's decision on whether to hear the case - and its eventual ruling if it does - will provide crucial guidance on how emerging gambling technologies fit within America's complex system of divided governmental powers. For New Jersey, the petition continues its tradition of pushing legal boundaries in gambling regulation, a role the state has embraced since its early adoption of online gaming and its leadership in challenging PASPA.