The Quapaw Tribe of Oklahoma is asking a federal court to throw out a lawsuit naming them as co-defendants. The suit by Attorney General Derek Schmidt aims to block the tribe from expanding a casino on the border into Kansas.

The suit was originally filed against the National Indian Gaming Commission, but was later amended to include the tribe.

The tribe’s lawyers argue that tribal officials and entities cannot be sued because sovereign immunity precludes the action in this incidence.

“Congress has set forth a comprehensive structure for the regulation of gaming on Indian lands, which does not include granting states the authority to enjoin tribal gaming activities on Indian lands where no tribal-state compact is present and where no class III gaming is u…...