US CFTC Files Federal Lawsuit Against Wisconsin: All-Out War with State Government Over Prediction Market Regulatory Authority

On April 28, 2026, the U.S. Commodity Futures Trading Commission (CFTC) intensified its legal offensive over prediction market regulatory authority by filing a federal lawsuit against the state of Wisconsin. This lawsuit is part of the CFTC's broader strategy to assert the supremacy of federal derivatives law against state gambling law enforcement. Wisconsin recently showed strong enforcement intent by suing major prediction market platforms for illegal gambling, but the CFTC has characterized this as an infringement on federal jurisdiction.

This confrontation with Wisconsin occurs amidst intensifying state-level crackdowns on prediction market platforms. The CFTC filed this lawsuit to block Wisconsin's attempt to classify event contracts—which are subject to federal regulation—as illegal sports betting. This follows the CFTC's defensive measures against New York and reflects the central government's commitment to establishing the legal status of prediction markets.

Sports betting and other forms of commercial gambling have long been illegal in Wisconsin. No company is above the law.

Wisconsin Attorney General Josh Kaul filed a lawsuit on April 23, 2026, against major prediction market operators including Kalshi, Coinbase, and Polymarket. Wisconsin claimed these companies are violating state law by providing what is essentially sports betting under the name 'event contracts.' Attorney General Kaul maintains that these platforms are no different from illegal gambling houses operating without state licenses.

Exclusive Jurisdiction and Federal Preemption

The CFTC maintains that it holds exclusive federal jurisdiction over all derivatives traded on registered exchanges based on the Commodity Exchange Act (CEA). CFTC Chairman Michael S. Selig emphasized that Congress granted oversight authority for commodity derivatives markets, including prediction markets, solely to the CFTC. He criticized some state governments for continuing illegal enforcement actions against federally regulated exchanges despite court rulings.

• April 2, 2026: CFTC files lawsuit against Arizona, Connecticut, and Illinois to confirm federal authority
• April 6, 2026: The Third Circuit Court of Appeals maintains an injunction blocking New Jersey's attempt to regulate Kalshi
• April 23, 2026: Wisconsin sues five major prediction market platforms for illegal gambling
• April 28, 2026: CFTC files lawsuit against Wisconsin to defend federal jurisdiction

Recent judicial rulings are bolstering the CFTC's offensive. On April 6, the Third Circuit Court of Appeals ruled in favor of the industry regarding New Jersey's attempt to halt Kalshi's operations, stating that federal derivatives regulation takes precedence over state gambling laws. This precedent is expected to serve as a basis for the CFTC to gain an advantage in the lawsuit against Wisconsin.

The prediction market industry points out that varying state regulations cause market confusion and calls for consistent federal oversight. Coinbase Chief Legal Officer (CLO) Paul Grewal argued that Wisconsin should accept the clear and consistent oversight of the CFTC as intended by Congress. Industry experts are concerned that individual state crackdowns could hinder the growth of innovative financial products.

Key Indicators for Future Legal Disputes

An ongoing lawsuit in Utah is also considered a significant variable that will determine the direction of future jurisdictional disputes. The parties involved in that case agreed to submit opposition briefs by May 1, 2026, and replies by May 8, with federal court hearings to follow. The outcome of the Utah case will serve as an indicator of how federal courts will set the boundary between state gambling regulatory authority and the CFTC's derivatives regulatory authority.

The outcome of this Wisconsin lawsuit is expected to become a major precedent for future attempts by other state governments to regulate prediction markets. If the court confirms the CFTC's exclusive jurisdiction once again, prediction markets will be firmly established as federal-level institutional financial products, free from state gambling regulations. This could provide legal stability for platform operators and serve as a catalyst for expanding market participation.

Major platforms such as Polymarket and Crypto.com have not released immediate official statements regarding this situation, but there is an atmosphere within the market expecting the resolution of legal uncertainty. Experts analyze that this lawsuit goes beyond a simple dispute over regulatory authority and will be a constitutional test case determining the status of digital asset-based prediction markets within the U.S. financial system. The jurisdictional conflict between the federal and state governments is expected to continue for the time being.

The CFTC is focusing on securing the legitimacy of the federal regulatory framework while continuing legal conflicts with other state governments, including New York, in addition to Wisconsin. This 'jurisdiction war,' which has continued throughout the first half of 2026, is projected to fundamentally reshape the future landscape of the prediction market industry in the United States. Market volatility and legal tension are expected to persist until a final court ruling is reached.