Wisconsin has filed lawsuits against major prediction market platforms, alleging that contracts traded on Kalshi, Polymarket, Coinbase, Robinhood and Crypto.com constitute illegal gambling under state law. The complaints, filed Thursday in Dane County Circuit Court, target three parallel ecosystems and represent the latest escalation in a multi-state regulatory fight that could reshape the $2 billion prediction market industry.

Market Context

The Wisconsin lawsuits arrive amid intensifying scrutiny of prediction markets across the United States. Nevada has already declared prediction market contracts "indistinguishable" from gambling, while New York Attorney General Letitia James described each contract as "a bet." The Third Circuit earlier this month ruled in favor of Kalshi, treating the CFTC's decision not to block contracts as effectively settling jurisdictional questions at the federal level. However, state courts have consistently taken a different position, creating a patchwork of regulatory approaches that industry participants warn could fragment the market across 50 jurisdictions.

Analysis

Attorney General Josh Kaul's office built its case using the platforms' own marketing language. The complaint cites Kalshi's Instagram advertisements claiming "The First Nationwide Legal Sports Betting Platform" and Polymarket's description of itself as "a platform where people can bet on the outcome of future events." The state argues that despite labeling products as financial instruments, the actual contract structure—a fixed payout for correct predictions versus total loss for incorrect ones—falls squarely within Wisconsin's statutory definition of gambling. The lawsuits also emphasize that platforms generate revenue through transaction fees on each contract, a model the state likens to a casino taking a cut of wagers. The industry defense rests on federal preemption, arguing that CFTC-regulated swaps fall under exclusive federal jurisdiction. This federalism argument will likely determine whether prediction markets operate under a single federal rulebook or face enforcement across individual states.

Key Numbers

- Three separate lawsuits filed in Dane County Circuit Court targeting Crypto.com, Polymarket, and the Kalshi distribution network

- Platforms charge transaction fees on each contract, creating revenue similar to casino rake

- Third Circuit earlier this month ruled in favor of Kalshi on jurisdictional grounds

- Industry estimates prediction market sector at approximately $2 billion

- Nevada and New York have already ruled against prediction markets under state gambling statutes

What to Watch

The cases are almost certainly headed for the Supreme Court, which will ultimately decide whether labeling contracts as financial instruments shields them from state gambling laws. The Wisconsin complaints add to a growing record of state challenges that could force SCOTUS to resolve the federalism conflict. Separately, a U.S. Army Special Forces soldier was arrested this week for allegedly placing bets on Polymarket about the raid that led to Nicolas Maduro's arrest, potentially using confidential government information—a separate legal liability issue that could further damage the industry's credibility with regulators.