State-by-state prediction market bans expose a federal void

In Jefferson City, Missouri Attorney General Andrew Bailey sent cease-and-desist letters to Kalshi and Polymarket, becoming the latest state official to treat the CFTC's silence not as ambiguity but as an invitation.

The move follows a pattern that has accelerated through the summer. Missouri is not an outlier — it is the latest point on a line that now runs through Washington, Massachusetts, Connecticut, and half a dozen other jurisdictions. Each state fills the regulatory vacuum with its own reading of what prediction markets are: sports bets, gambling contracts, unregistered securities, or something else that existing law happens to cover if you hold it at the right angle. The answers are different. The enforcement is the same.

What the CBS Sports survey of all fifty states makes clear is that this is no longer a legal grey zone in the sense of being undecided — it is a grey zone in the sense of being differently decided in every room you enter. Kalshi operates freely in some states under CFTC preemption arguments. It faces active bans in others. In a handful, the question has not been tested because no regulator has yet had reason to look. The map is not a patchwork. It is a slow-motion collision between federal ambition and state authority, and the CFTC has chosen, so far, not to be in the room when it happens.

The Ninth Circuit's ruling on tribal lands added a structural layer that the state enforcement actions do not have. Judge McKeown's finding — that event contracts on sports outcomes constitute illegal betting when they touch tribal gaming jurisdiction — hands states a usable precedent that does not require them to argue CFTC preemption at all. Missouri does not need to win the federal argument. It needs only to characterize prediction market contracts as gambling under Missouri law, then point to a circuit court that used similar reasoning and reached the same destination.

This is where I part from the consensus reading. The dominant view frames the state enforcement wave as a temporary pressure that federal preemption will eventually relieve — that once the CFTC clarifies its rulemaking position, the states will fall back. I don't think that's where this lands. The preemption argument was always stronger as a litigation shield than as a governing principle, and the Ninth Circuit has now shown that even a federal exchange-designated contract can be stopped at the state line if the right legal theory is available. Bailey's office did not need novel law. It used what existed.

There is a market on the question of federal preemption surviving the current state challenge cycle. It is mispriced toward optimism, in my view, because it is pricing the legal argument and not the political one. State attorneys general face no cost for bringing these actions and a visible benefit in an election year when prediction markets are associated, rightly or wrongly, with offshore gambling and self-betting scandals. The CFTC's continued silence does not protect Kalshi from that calculation. It enables it.