American Indian tribes file to block Kalshi and Polymarket from tribal land
A coalition of 30 federally recognized American Indian tribes and 11 Indian regulatory agencies filed amicus briefs challenging Kalshi, Polymarket, and the CFTC over prediction market access on tribal land. The tribes seek authority to regulate these platforms themselves rather than defer to federal or state oversight. The action targets both Kalshi and Polymarket. Novig, which was recently approved by the CFTC, is also referenced in the tribal push. The filings represent tribal gaming interests pushing back against expansion of regulated event contracts into territories they consider under sovereign control, published June 16, 2026.
Kalshi and Polymarket now face tribal sovereignty claims layered atop federal and state court fights in New Mexico. Any ruling recognizing tribal regulatory authority over prediction markets would force both platforms to negotiate separate compliance regimes with sovereign nations or geofence tribal lands entirely.
Joins the CFTC's parallel federal preemption cases against Minnesota and Rhode Island's felony prediction market ban as tribal nations add a third sovereign front to the regulated prediction-markets fight.