Prediction markets have become one of the biggest flashpoints in U.S. gambling, and tribal operators are now treating them as a direct threat to a business they spent decades building under federal law, state compacts, and tribal regulation. At this week’s Indian Gaming Association convention in San Diego, the issue dominated public panels and private meetings, with tribal leaders openly warning that platforms such as Kalshi and Polymarket are stepping into gambling while trying to avoid gambling rules.
The language coming out of the convention was not cautious. Indian Gaming Association chairman David Bean said prediction markets are “unlawful gambling dressed up as finance” and accused the platforms of trying to sidestep the framework tribes had to negotiate and comply with. The association also announced a defense fund to support legal action against the sector.
Tribal gaming has too much at stake to ignore the fight
The money behind this explains the intensity. Tribal gaming produced nearly $44 billion in 2024, according to the National Indian Gaming Commission, and that revenue supports far more than gaming floors. In many communities it helps fund healthcare, housing, education, infrastructure, and day-to-day government functions.
That is why tribal leaders are not treating prediction markets as just another online novelty. They see them as a rival product that can siphon betting dollars away from tribal casinos and sportsbooks while avoiding the compact terms, exclusivity agreements, and compliance burdens tribes already carry.
The legal fight is already under way
This is no longer only a policy debate. Four tribal nations have already sued Kalshi and Robinhood in federal court, according to the AP’s reporting from the convention, and the Indian Gaming Association has also filed briefs backing lawsuits against prediction market operators.
For tribes, the fight is about more than revenue. It also goes to sovereignty. Tribal gaming did not grow by accident. It grew through years of litigation, federal legislation, and state-by-state compacting. Tribal leaders are now asking why prediction markets should be allowed to sell betting-like contracts nationwide while claiming they sit outside the same structure.
Tribes see prediction markets as a challenge to the whole framework
That makes this clash different from ordinary competition. Tribal casinos already live with commercial casinos, state lotteries, sportsbooks, and online pressure. Prediction markets bother them in a different way because they appear to enter the field through another legal label entirely.
The pushback is only getting louder. Tribes are funding legal action, pressing Congress, and trying to make sure this does not become another case where a new gambling product takes root before anyone forces it into the same rulebook. The convention made one thing obvious: tribal gaming no longer sees prediction markets as a side issue. It sees them as a line fight over money, power, and sovereignty.
