Supreme Court now holds the circuit split on prediction markets

Three petitions arrived at the Supreme Court within weeks of each other, each asking the same underlying question in slightly different legal wrapping: does federal commodities law displace state gaming regulation when the product being sold is a contract on a sporting outcome. The Court has not yet agreed to hear any of them. That is the fact that matters most right now, and the one that receives the least attention.

The Third Circuit said yes to federal preemption in May, blocking New Jersey's cease-and-desist. The Ninth Circuit said no, unanimously, ruling that sports event contracts are wagers rather than swaps. Kalshi's response was to seek en banc review from eleven Ninth Circuit judges rather than go straight to Washington. Robinhood and Crypto.com went directly to the Supreme Court. New Jersey filed its own petition. Three separate procedural bets on the same underlying hand.

What makes Kalshi's choice telling is what it reveals about the company's read of its own position. En banc review is slower, and it loses the circuit split that makes Supreme Court review more likely. You pursue it when you believe the panel made an error clean enough to correct at the circuit level, or when you want a more favorable record before the higher court sees the case. The Ninth Circuit panel was unanimous. Unanimous panels are rarely reversed en banc. Someone at Kalshi calculated that the Supreme Court record looks better if they exhaust the circuit first — which means they expect to lose the en banc and are already thinking about the petition that follows.

The consensus read on this dispute treats it as a regulatory question with a correct legal answer waiting to be found. The preemption argument is strong or it is weak, and the courts will eventually say which. That framing understates what is happening in Connecticut, which is not waiting. Nine platforms received cease-and-desist orders. State enforcement under unfair trade practices law does not pause for federal litigation. Platforms that comply withdraw from the market. Platforms that do not comply accumulate legal exposure that compounds with each week the Supreme Court delays.

There is a version of this story where the Court grants certiorari, consolidates the petitions, and issues a ruling that settles the classification question. Prediction market contracts are swaps or they are not. That version takes eighteen months at minimum and requires the Court to find the question cert-worthy, which four justices must agree it is.

The version the state enforcement timeline actually supports is different. Connecticut, Michigan, and the other states moving against these platforms are not trying to win the legal argument before the Supreme Court rules. They are trying to make the market unworkable in their jurisdictions long enough that the platforms negotiate, exit, or fold the sports vertical entirely. The legal question becomes moot if the business model collapses under the weight of compliance costs and platform withdrawals before certiorari is granted.