New Jersey attorney general takes Kalshi case to federal court

New Jersey Attorney General frames Kalshi fight as a state sovereignty case

Jennifer Davenport did not file a Supreme Court petition to win a prediction market argument. She filed it to win a federalism one.

That distinction matters more than the sports betting question at the surface of New Jersey's brief. The petition the state's attorney general submitted frames Kalshi's legal theory not as an isolated claim about derivatives regulation but as a structural threat: if a CFTC-registered exchange can offer contracts on any underlying event and thereby displace state gambling law entirely, then states lose jurisdiction not only over prediction markets but potentially over the broader scaffolding of regulated sports wagering they spent years building after PASPA fell.

Davenport's argument is that Congress did not silently preempt state gambling law when it created the Commodity Exchange Act. That is the load-bearing sentence in New Jersey's petition, and it is a better argument than its critics have credited. Federal preemption by silence is a doctrine courts apply with stated reluctance. The Third Circuit found preemption anyway. The Ninth Circuit, presented with Kalshi's own request for injunctive relief against Nevada's gaming board, said the contracts "have the hallmarks of sports betting" and denied relief. Two circuits, two frameworks, one exchange.

Forty-four state attorneys general have lined up behind New Jersey's position. That coalition is the detail the Bank of America note correctly identifies as the political signal — not the legal one. Supreme Court justices read amicus lists. A coalition that spans that much of the political map on a federalism question is not easy to dismiss as regulatory parochialism, and it changes the calculus on whether the Court wants to wait another circuit cycle before taking the case.

Bank of America's analysts suggest the Court may hold off, reasoning that pending cases in other circuits could deepen the record before any certiorari decision. That is a defensible read of institutional preference. The Court does prefer a fully developed split. What the note underweights is that the split here is not merely technical — it is operational. Kalshi is running a live national exchange, geofenced out of Michigan under a court order that carries a half-million-dollar daily penalty, free to operate in New Jersey under a Third Circuit ruling that a coalition of 44 attorneys general calls profoundly wrong. The Court does not usually let that kind of parallel legal reality persist for multiple years.

Kalshi's response through spokeswoman Dani Lever was the argument the company has made consistently: it is a federal exchange, CFTC-registered, and cannot be subject to fifty separate state regulatory regimes. That argument is not wrong as a policy matter. A nationally fragmented regulatory structure for a digital exchange is genuinely unworkable. But "unworkable" and "unconstitutional" are not the same word, and the states are not arguing for fifty regimes — they are arguing that federal preemption requires explicit congressional intent, and that it does not exist here.

My read is that the Court takes this case, and takes it sooner than Bank of America expects. The circuit split is live, not theoretical. The commercial stakes are in the billions weekly. And the federalism question — whether commodity exchange registration can preempt an entire category of state consumer protection law without Congress saying so — is exactly the kind of structural question this Court has shown appetite for.

Kalshi has won on the legal merits at the district level and in the Third Circuit. It has lost operationally in Michigan and Nevada. A Supreme Court ruling in New Jersey's favor would not necessarily shut the exchange down, but it would hand fifty state legislatures the authority to decide whether it operates within their borders. That is the outcome Kalshi's business model cannot survive, which is why Dani Lever's statement was as flat and certain as it was.