Judge Blocks Arizona from Taking Action Against Kalshi

A federal judge has temporarily blocked Arizona from enforcing its gambling laws against prediction market operator Kalshi. The ruling also halts a pending criminal case, canceling a scheduled arraignment hearing.

The Kalshi prediction markets app on a mobile phone. (Source: Getty Images)

US District Judge Michael Liburdi issued the order Friday, siding with federal regulators in an escalating dispute over jurisdiction. The decision pauses Arizona's prosecution, which includes 20 misdemeanor wagering charges against Kalshi.

Related: Kalshi Forced to Temporarily Halt Prediction Markets in Nevada

State officials allege the company operated an illegal betting business involving elections, sports, and player performance markets. The judge's intervention introduces a significant shift in the legal trajectory of the case.

The ruling centers on whether Kalshi's event contracts qualify as financial instruments under federal law. The Commodity Futures Trading Commission (CFTC) argued these contracts meet the definition of swaps under the Commodity Exchange Act. Liburdi found the agency demonstrated a reasonable likelihood of success on that claim. The order emphasized that federal law grants the CFTC exclusive authority over such markets.

Kalshi's platform allows users to trade contracts tied to real-world outcomes, structured as yes or no positions. The company maintains that this model differs fundamentally from traditional gambling operations.

It argues participants trade with one another rather than against a house, aligning the platform with financial exchange principles. That distinction remains a salient issue in determining regulatory oversight.

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Arizona prosecutors contend the platform markets itself as a venue for betting, making it subject to state gambling laws. The state prohibits unlicensed wagering businesses and bans betting on elections. Officials argue these rules apply regardless of how the contracts are structured. A spokesperson for the attorney general's office indicated the state is reviewing its next legal steps following the ruling.

The dispute reflects a broader conflict between state regulators and federal authorities over prediction markets. The CFTC filed suit after Arizona issued cease-and-desist notices and pursued criminal charges.

Federal officials argue such actions intrude on national regulatory authority. The case is part of a growing wave of litigation involving multiple states and similar platforms.

Legal outcomes across jurisdictions have varied in recent months. Courts in Nevada and Massachusetts have issued early rulings favoring state restrictions on prediction markets. Meanwhile, decisions in New Jersey and Tennessee have leaned toward federal jurisdiction and supported operators like Kalshi. These conflicting rulings highlight ongoing uncertainty in how such markets will be regulated nationwide.

The federal government has also launched separate legal challenges against states, including Connecticut and Illinois. Those cases similarly question state authority over event-based trading platforms.

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