The National Football League is backing New Jersey’s effort to have the U.S. Supreme Court decide whether states can regulate sports bets offered on prediction-market platforms, putting the league at odds with President Donald Trump’s administration over who should oversee the fast-growing market. In a brief filed with the court Thursday, Oct. 8, the NFL argued that the Commodity Futures Trading Commission and prediction-market companies have taken a permissive approach to sports betting that threatens the integrity of games. The league said protecting its games and fans has been a priority as legal sports betting expanded across states. New Jersey asked the Supreme Court last month to resolve the dispute between state and federal authority. The NFL’s filing supports that request. Trump’s position is that prediction markets should be regulated solely by the federal government, rather than by states. The case could shape how sports-related contracts offered by platforms such as Kalshi and Polymarket are regulated, and whether states can apply their own gambling rules. The NFL said state-level oversight has been part of its efforts to address legal sports betting; a Supreme Court decision could affect those arrangements nationwide.