Four New Mexico tribes filed a federal lawsuit against prediction market platform Kalshi on Tuesday, May 13, 2026, alleging the company is enabling illegal sports gambling on tribal lands in violation of the federal Indian Gaming Regulatory Act. The plaintiffs are the Mescalero Apache Tribe, the Pueblo of Isleta, the Pueblo of Pojoaque, and the Pueblo of Sandia. The complaint was filed in U.S. District Court in Albuquerque and marks the third IGRA-based lawsuit against Kalshi, following similar cases in California and Wisconsin.
The tribes argue that Kalshi’s sports event contracts — covering game outcomes, point spreads, totals, props, and parlays — are functionally identical to the sports betting products offered at licensed tribal casinos. Under New Mexico law and the tribes’ gaming compacts, sports betting is permitted only in person at tribal gaming facilities and only for patrons aged 21 and over. Kalshi, which is federally regulated by the CFTC, allows anyone 18 or older to access its sports markets from anywhere in the state, including on tribal reservation lands.
What the Tribes Are Seeking
The lawsuit asks the federal court to issue an injunction barring Kalshi from operating sports betting on tribal lands in New Mexico and declares that the company’s conduct violates IGRA and tribal gaming ordinances. The tribes are also seeking civil penalties and punitive damages. The Mescalero Apache ordinance carries fines of up to $5,000 per day, per violation, plus punitive damages for willful conduct.
Sandia Pueblo Gov. Stuart Paisano said in a statement that prediction markets “divert essential revenue away from our governments” and provide an end-run around decades of carefully negotiated gaming compacts. He also highlighted the age gap: Kalshi permits 18-year-old users to bet on sports in a state where tribal gaming facilities only allow gambling for those 21 and older.
The Broader Regulatory Battle
A Wisconsin federal judge ruled earlier this week that the Ho-Chunk Nation can pursue its IGRA claim against Kalshi, finding that the tribe showed a likelihood of success on the merits. That ruling has already been cited by legal observers as likely to accelerate similar lawsuits. Kalshi continues to argue that its platform is a federally regulated exchange under the Commodity Exchange Act and therefore outside state and tribal gaming authority. Whether federal courts side with the CFTC’s jurisdictional argument or with tribal gaming sovereignty will define the boundaries of prediction market legality for years to come. Players in states with active tribal gambling operations, such as those exploring sweepstakes casino alternatives, should monitor how the tribal IGRA cases progress as they could influence the broader legal treatment of gray-area gaming platforms nationwide.
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