Crypto prediction market platforms like Polymarket and Kalshi are locked in a nationwide legal battle with U.S. states over regulatory authority. More than 19 legal disputes have emerged since 2025, with platforms arguing they fall under exclusive federal oversight by the Commodity Futures Trading Commission (CFTC), while states claim they are unlicensed gambling operations that bypass local laws and taxes.

What Are Prediction Markets and Why Do They Matter?

Prediction markets allow users to buy and sell contracts tied to future events. Instead of placing traditional bets, traders purchase and sell event contracts whose prices fluctuate based on market expectations. These contracts can involve elections, sports outcomes, cryptocurrency prices, Federal Reserve decisions, geopolitical conflicts, and entertainment events.

The industry gained significant attention during the 2024 U.S. election cycle, when platforms like Polymarket and Kalshi often outperformed traditional polling models in forecasting outcomes. This success attracted major crypto exchanges and trading platforms into the sector. Coinbase partnered with Kalshi ahead of a January 2026 launch, while Crypto.com, Robinhood, and Gemini explored or expanded prediction-market offerings.

Why Are States Fighting Back Against Prediction Markets?

State regulators view prediction markets fundamentally differently from the companies operating them. Gaming regulators argue the platforms are effectively offering sports betting, election wagering, and online gambling without obtaining state gambling licenses. Officials also fear the platforms threaten existing sportsbook ecosystems that generate billions in tax revenue.

States claim prediction markets avoid critical regulatory requirements and consumer protections:

• Licensing Requirements: Platforms operate without obtaining state gambling licenses required for traditional sportsbooks and betting operations.
• Gambling Taxes: States lose significant tax revenue that would normally flow from licensed gambling operations within their borders.
• Consumer-Protection Rules: Prediction markets bypass state-mandated safeguards designed to protect bettors from fraud and unfair practices.
• Responsible-Gaming Oversight: Platforms lack mandatory responsible-gambling features and protections required by state law.

Illinois began taking action around April 2025, while Connecticut escalated later that year. Other states, including Nevada, Massachusetts, New York, Arizona, Michigan, and New Jersey, soon followed with restrictions, cease-and-desist letters, or lawsuits targeting Kalshi, Polymarket, Crypto.com, Coinbase-linked products, and related platforms.

How Did the Legal Battle Escalate Into a Federal Showdown?

The industry's first major legal counterattack came from Coinbase. On December 19, 2025, Coinbase filed federal lawsuits against Connecticut, Michigan, and Illinois, seeking court orders blocking the states from interfering with prediction-market products tied to its planned Kalshi partnership launch in early 2026. Coinbase argued that prediction markets fall under the exclusive authority of the CFTC through the Commodity Exchange Act (CEA), meaning state gaming boards have no jurisdiction.

Kalshi became the central figure in the battle, launching multiple lawsuits against states while defending itself from state enforcement actions nationwide. The company's core legal argument was that event contracts are federally regulated "swaps" or derivatives under the Commodity Exchange Act. Under that interpretation, only the CFTC can regulate them.

The conflict escalated dramatically in April 2026. The CFTC and the U.S. Department of Justice filed separate federal lawsuits against Arizona, Connecticut, and Illinois, marking the first known instance of the federal government suing states over prediction-market regulation. The federal agencies argued that Congress had already granted the CFTC exclusive authority over event contracts through the Commodity Exchange Act, and that state interference represented "unprecedented overreach" that threatened the federal derivatives framework.

This transformation from company versus states into federal government versus states shocked many legal observers. The CFTC historically had not aggressively sued states over gambling-related issues. Under the more crypto-friendly regulatory environment of 2025 and 2026, however, the agency increasingly positioned itself as a defender of prediction-market innovation.

What Legal Victories Have Prediction Market Platforms Achieved?

Several court rulings in 2026 strengthened the industry's position. One of the biggest victories came on April 6, 2026, when the Third Circuit Court sided with Kalshi in a major New Jersey-related case. The court ruled that Kalshi's sports-event contracts likely qualified as federally regulated swaps, meaning federal law preempted state gambling restrictions.

The decision gave prediction-market operators a major legal boost. Soon after, the New York Attorney General sued Coinbase and Gemini over prediction-market activity, and the CFTC responded by suing New York in federal court. Wisconsin, Rhode Island, Washington, and Minnesota also entered the fight through restrictions, bans, or lawsuits. Kalshi and Polymarket launched additional legal actions against some states.

The legal map became fragmented, with some federal courts siding with the CFTC and others leaning toward state authority. That growing divide raised expectations that the issue could eventually reach the U.S. Supreme Court.

How to Understand the Key Issues in This Regulatory Dispute

• Federal Preemption Question: The core dispute centers on whether the Commodity Exchange Act grants the CFTC exclusive authority over prediction markets, or whether states retain the right to regulate them as gambling operations under their own laws.
• Market Manipulation Concerns: Reports surfaced that a small number of large crypto wallets heavily influenced certain Polymarket outcomes, intensifying scrutiny around transparency and manipulation risks that regulators worry about.
• Enforcement Challenges: Platforms like Polymarket rely heavily on blockchain infrastructure and crypto payments, making enforcement harder for state regulators accustomed to traditional sportsbook oversight, including issues with offshore operations and pseudonymous wallets.
• Revenue and Tax Implications: States fear major losses in sportsbook revenue and gambling taxes if federally regulated prediction markets expand nationwide, threatening existing licensed gambling ecosystems.
• Insider Trading and Election Integrity: Congressional investigations reportedly examined whether traders used nonpublic geopolitical or political information to profit from event contracts tied to wars, military actions, or elections.

Prediction-market volume exploded after the 2024 election cycle and the launch of sports-event contracts. Some reports suggested Kalshi's trading volume surged from roughly $100 million to billions within a relatively short time, intensifying state concerns about the scale of the industry.

The outcome of this legal war will likely determine whether prediction markets can operate freely across the United States as federally regulated financial instruments, or whether states can enforce gambling restrictions that could fragment the market into a patchwork of different regulatory regimes. With multiple lawsuits pending and the possibility of Supreme Court involvement, the resolution could reshape not only prediction markets but also the broader relationship between federal and state authority over crypto-based financial products.