Kalshi and Polymarket face legal barriers across U.S. states

CBS Sports mapped the legal status of Kalshi and Polymarket across all fifty states this week, and the picture it assembled is less a regulatory patchwork than a structural argument about what kind of law the Commodity Exchange Act actually is.

The mapping exercise matters because it makes visible something the individual court filings obscure: the states moving against prediction market operators are not acting on the same theory. Michigan's attorney general secured a block on the basis that Kalshi was operating an unlicensed sports betting platform. Connecticut's enforcement wave has reached platforms far beyond Kalshi, suggesting the state is reading "sports event contract" broadly enough to capture any binary outcome tied to athletic competition. Iowa's federal court denied a preemption injunction and cited Congressional silence as the interpretive key. These are three different legal moves, and they do not add up to a single front.

That distinction is where I think the current analysis is getting the story wrong. The consensus read — that Kalshi and Robinhood are fighting a holding action while the Supreme Court resolves the preemption question — treats the state actions as temporary friction. I don't think that's where this lands. The state actions are revealing something about the texture of the Commodity Exchange Act that the preemption theory cannot paper over: the Act was written to govern derivatives on commodities and financial instruments, and the enforcement history the CFTC accumulated under it was not built on sporting events. When Iowa's judge reached for Congressional silence, she was not filling a gap. She was pointing at the gap and saying it was not hers to fill.

The Ninth Circuit en banc petition and Robinhood's Supreme Court approach now sit beside that gap. En banc review is a request for the full circuit to reconsider a panel decision, and it is granted rarely — most circuits grant it in fewer than one in twenty cases. The petition signals that Kalshi believes the panel ruling creates a circuit conflict serious enough to warrant correction, or that it contains a legal error the full court would not have made. Whether the Ninth Circuit agrees is not on the public record yet.

What the CBS Sports state-by-state mapping surfaces, and what the litigation filings alone do not show, is that the operator-by-operator, state-by-state enforcement pattern is building precedent independently of the federal appellate process. Each state court order that survives is a data point for the next attorney general. Each denial of a preemption injunction is a permission structure for the state that reads it.

The relevant legal standard here is not only whether the CEA expressly preempts state gaming regulation — the question the Ninth Circuit panel addressed — but whether the CFTC's designation of these contracts as swaps or futures is itself legally defensible against the states' characterization of the same instruments as unlicensed sports wagers. Those are different questions with different answers, and the Supreme Court, if it takes Robinhood's petition, will have to decide which one it is actually being asked.