New Jersey Asks the Supreme Court to Decide Who Regulates Kalshi

Five days after the Ninth Circuit split from the Third, New Jersey has filed for certiorari, one day before its deadline. The question is whether a federal commodities registration lets a company offer sports betting in every state while following the gambling law of none.

• New Jersey Attorney General Jennifer Davenport filed a petition for a writ of certiorari with the United States Supreme Court on 2 September, seeking review of the Third Circuit's decision in favour of KalshiEX
• The question presented is whether prediction markets can offer sports wagers without complying with state sports-gambling laws, or whether those offerings remain subject to state regulation
• The Third Circuit ruled 2-1 on 6 April in KalshiEX LLC v. Flaherty that sports event contracts are swaps and that the Commodity Exchange Act preempts state law as applied to them on a CFTC-registered exchange
• The Ninth Circuit held the opposite on 28 August, ruling 3-0 for Nevada that such contracts are likely not swaps, producing the circuit split that makes review far more likely
• Davenport said companies like Kalshi "claim to offer legal sports betting in all 50 States, but they refuse to follow the gambling laws of any State", and that the Court must recognise "that Congress did not silently make the sports-betting industry immune from state law"

The Split Arrived First, and the Petition Followed Within a Week

New Jersey's attorney general filed for certiorari on 2 September, a day before the state's deadline to seek review of the Third Circuit's April decision. The timing is not incidental. When that decision came down, an appeal to the Supreme Court was a long shot; a single circuit ruling against a state does not usually attract review. What changed in the intervening five months is that another circuit reached the opposite conclusion.

The Third Circuit ruled on 6 April in KalshiEX LLC v. Flaherty, affirming by two to one the preliminary injunction Kalshi had obtained against New Jersey officials. Judge David Porter, joined by Chief Judge Michael Chagares, held that sports event contracts are swaps under the Commodity Exchange Act and that the Act preempts state laws purporting to regulate them when traded on a CFTC-registered designated contract market. The court identified both field and conflict preemption, with field preemption resting on the Act's grant of exclusive jurisdiction to the Commodity Futures Trading Commission. Judge Jane Richards Roth dissented, arguing that state gambling laws are not preempted.

On 28 August the Ninth Circuit went the other way, ruling three to nil for Nevada. That panel held Kalshi had not shown a likelihood that the Act preempts state gaming law as applied to sports-related event contracts, reasoning that the statutory definition covers an event with a financial, economic or commercial consequence, which does not describe the result of a sporting contest. Two federal appellate courts now disagree on whether a sports outcome is a swap.

Davenport's framing of the petition is blunt. Companies like Kalshi, she said, "claim to offer legal sports betting in all 50 States, but they refuse to follow the gambling laws of any State", and the Court must recognise "that Congress did not silently make the sports-betting industry immune from state law".

The petition does not arrive unsupported. Forty-four states, hundreds of tribes and casino interests have opposed Kalshi's legal theory in various proceedings, and New Jersey co-led an amicus brief joined by 39 other jurisdictions in the Ninth Circuit case that produced the split. This is the first petition to ask the Supreme Court whether a company can self-certify sports wagers with the CFTC and thereby operate outside state gambling law.

A Circuit Split Is the Only Thing That Reliably Gets This Heard

The Supreme Court takes a small fraction of the petitions filed, and disagreement between federal appellate courts on an important question of federal law is the most dependable reason it grants review. New Jersey lost in the Third Circuit in April and had months to sit on that loss; it filed within five days of Nevada winning in the Ninth. The sequencing tells you the state understands exactly what changed. Until 28 August the argument was that a circuit had got a statute wrong. Since 28 August it has been that identical conduct is lawful in Philadelphia and unlawful in Las Vegas, which is precisely the condition the Court exists to resolve. That does not make a grant certain, and the interlocutory posture, both rulings being on preliminary injunctions rather than final judgments, is a real obstacle. But the odds of this being heard are materially better than they were a week ago.

The Industry Is Now Operating on a Ruling That May Not Survive

Kalshi and its competitors have built a national footprint on the Third Circuit's reasoning, and that reasoning is now contested by a coequal court. Everything the sector has done in the last five months, the exchange listings, the sports partnerships, the state-by-state litigation strategy, rests on a preemption theory with a 50% record at appellate level. Operators and their counterparties should be pricing that. A partner signing a multi-year deal with a prediction market venue this month is accepting the risk that the Supreme Court adopts the Ninth Circuit's reading and the entire sports vertical becomes subject to fifty separate licensing regimes it was designed to avoid. That is not a remote tail risk any more; it is a live question with a docket number attached.

For the Regulated Sector, This Is About the Cost of the Licence

The reason this matters beyond prediction markets is what it says about the value of a gaming licence. Licensed sportsbooks pay for market access, hold reserves, run responsible-gambling programmes, submit to audits and remit state tax. If a CFTC registration lets a competitor offer economically similar products in the same states without any of that, the licence is not a permission, it is a handicap. Nevada, New Jersey and the tribes are not litigating an abstraction about the Commodity Exchange Act; they are defending the premise that a state can decide who takes bets within its borders and on what terms. The Court's answer will set the terms of American sports betting for the next decade, whichever way it lands.

New Jersey lost this argument in April and has now built its route back through a court that agreed with it in August. The next word belongs to Kalshi's response and then to nine justices.