Wisconsin Tribe Files Lawsuit Over Kalshi Prediction Markets

Michael Savio
By: Michael Savio
Aug 21, 2025
Sports Betting
Photo by Corey Coyle, CC BY 3.0, via Wikimedia Commons

Photo by Corey Coyle, CC BY 3.0, via Wikimedia Commons

Key Takeaways

  • The Ho-Chunk Nation claims Kalshi is violating gambling laws
  • Most sports prediction markets have a minimum age of 18
  • Kalshi will soon offer spread, total, and prop bet markets this fall

The lawsuits won’t stop coming for Kalshi and sports prediction markets.

The Ho-Chunk Nation of Wisconsin has filed a lawsuit against the operator over its controversial markets. The lawsuit focuses on the Indian Gaming Regulatory Act, which paved the way for tribal gaming in the US. The tribe alleges that Kalshi’s sports prediction market is a form of sports betting and is being conducted on tribal lands. 

The tribe is seeking a permanent injunction, which would bar it from operating on its land.

Kalshi Offering Illegal Gambling

The Ho-Chunk lawsuit centers on the argument that sports prediction markets qualify as gambling. While the operator continues to argue that their event contracts are a form of commodity trading, the tribes argue that they meet the definition of gambling, as defined in IGRA.

The lawsuit echoes the arguments made by other tribes and state gaming regulators, who are also taking Kalshi to court. While opponents picked up a small victory in Maryland earlier this month, courts have yet to accept arguments that sports prediction markets qualify as gambling. As a result, Kalshi has begun to file counter-suits, which could prove costly.

Tribes Point to Link to Underage Gambling

While the lawsuit focused on the legality of sports prediction markets, it also touches on the danger they pose to underage bettors. With the minimum age set at 18 for most prediction markets, more high school and college students now have a way to bet on sports legally. With no problem gambling monitoring or protocols, the tribe believes it could lead to a national crisis.

“Currently, 18-year- old high school students across the United States—including some that are located on Indian reservations—are on their phones placing bets on the outcome of virtually every sporting event occurring across the globe, without any regulation of that betting by states or Indian tribes and the protective measures related to corruption and problem gambling imbedded in such regulatory schemes, in contravention of federal, state, and tribal law,” the tribal lawsuit claims. 

Kalshi Showing No Signs of Concern

Despite being under fire from all sides, Kalshi is showing no signs of concern over its future. They proved that once again when announcing that it will soon offer spread, total, and prop betting markets for the upcoming NFL and NCAA football seasons. These options will be available on Robinhood, which has stood by its partner.

While the confidence is impressive, the new markets will give weight to lawsuits filed by tribes and states. Since these options are only found at sportsbooks, the argument that these markets aren’t a form of sports betting will be harder to sell in court.

Kalshi has deep ties to the White House, but that might not be enough. We saw the daily fantasy sports industry suffer a massive blow when it began offering these types of betting options. If Kalshi isn’t careful, they could end up facing a similar fate.

Michael is a writer from Denver who covers the sports betting industry for Casino.com. He has been covering the industry for over four years, focusing on providing accurate and easy-to-understand information for readers. When he’s not covering the industry, he’s betting on sports or exploring everything that Colorado has to offer.