Federal Judge Denies Kalshi Bid to Block New York Gambling Enforcement

A Manhattan federal judge has ruled that Kalshi's federal registration does not shield its sports contracts from New York gambling law, the prediction-market sector's most significant legal setback to date. The decision clears the way for state regulators and the Attorney General to pursue enforcement, and Kalshi has already appealed.

• US District Judge Analisa Torres of the Southern District of New York denied Kalshi's motion for a preliminary injunction in KalshiEX LLC v. Williams, reported on 7 and 8 July
• The court found that the Commodity Exchange Act does not pre-empt New York's gambling law under express, field or conflict pre-emption, rejecting Kalshi's central legal argument
• The ruling lets the New York State Gaming Commission continue regulating Kalshi's sports event contracts, with the state Attorney General's office expected to pursue civil enforcement
• Kalshi filed a notice of appeal to the US Court of Appeals for the Second Circuit the same day, keeping its federal-pre-emption argument alive
• The decision contrasts with earlier orders that shielded Kalshi in New Jersey and Tennessee, and follows a recent restraining order in Michigan, deepening a split between courts over how prediction markets should be treated

A New York Court Rejects Kalshi's Core Federal-Pre-emption Defence

US District Judge Analisa Torres of the Southern District of New York has denied Kalshi's motion for a preliminary injunction in KalshiEX LLC v. Williams, a decision reported on 7 and 8 July that removes the legal protection the prediction-market operator had sought against New York state enforcement.

At the centre of the ruling is pre-emption. Kalshi had argued that, as a Commodity Futures Trading Commission (CFTC)-registered exchange, its sports event contracts are governed by federal commodities law and therefore beyond the reach of state gambling statutes. Judge Torres rejected that argument on every front, finding that the Commodity Exchange Act (CEA) does not pre-empt New York's gambling law under express, field or conflict pre-emption.

The decision allows the New York State Gaming Commission to continue treating Kalshi's sports contracts as subject to state regulation. It also opens the door to enforcement by the office of New York Attorney General Letitia James, which is expected to pursue civil remedies including restitution, disgorgement, financial penalties and injunctive relief across the United States' most closely watched prediction-market dispute so far.

Kalshi moved quickly to contest the ruling, filing a notice of appeal to the US Court of Appeals for the Second Circuit the same day. The appeal keeps the company's federal-pre-emption argument alive at a higher court, and the eventual Second Circuit decision could carry weight well beyond New York.

The New York ruling runs against the grain of earlier decisions elsewhere. Kalshi has previously secured orders shielding it from state action in New Jersey, where a federal appeals court sided with the company, and in Tennessee. Days earlier, a Michigan state court had granted a temporary restraining order against the exchange, underlining how differently jurisdictions are treating the same product. The divergence has produced a split between courts on whether CFTC registration insulates prediction markets from state gambling law.

The Ruling Strikes at the Legal Foundation of the Whole Model

Kalshi's nationwide sports-contract business rests on a single premise: that federal registration overrides state gambling law wherever the two collide. A federal judge rejecting all three forms of pre-emption, express, field and conflict, is the most direct challenge yet to that premise, and it comes from the influential Southern District of New York rather than a state court. If the reasoning holds on appeal, it would leave prediction-market operators exposed to the full weight of state gambling regulation, from licensing to anti-money-laundering controls, in every state that chooses to assert it, forcing a category built on the assumption of federal insulation to confront a patchwork of state regimes. The finding is not final, but it targets the foundation rather than the periphery of the model.

A Circuit Split Makes This a Question for Higher Courts

The most consequential feature of the current landscape is inconsistency. Courts in New Jersey and Tennessee have protected Kalshi, a New York court has now refused to, and Michigan has moved to restrain it, leaving operators, regulators and investors without a settled answer, part of a broader federal-state conflict that has seen the CFTC take New York to court. Splits of this kind rarely stand indefinitely, and Kalshi's same-day appeal to the Second Circuit is a bid to convert a damaging district-court loss into favourable appellate precedent. A definitive resolution may ultimately require the Supreme Court. Until then, the sector faces the borderless problem in its starkest form: a federally registered product whose legality depends on which state, and which court, is asked.

Enforcement, Not Just Regulation, Is Now on the Table

The New York decision does more than affirm the state's right to regulate; it exposes Kalshi to active enforcement. The Attorney General's expected pursuit of restitution, disgorgement, penalties and injunctive relief shifts the stakes from a licensing question to potential financial liability, the kind of consequence that concentrates commercial minds far more than a regulatory rebuke. For a company still arguing that its contracts are not gambling at all, the prospect of being ordered to return revenue and pay penalties in a major market is a materially different threat. The legal principle will be settled on appeal, but the immediate signal to the prediction-market sector is that state enforcement is no longer theoretical.