Prediction Markets: Illinois Court Backs Kalshi

A federal district court ruling in Illinois has barred the state from applying its own gambling regulations to Kalshi, adding a new development to a dispute over who has authority over prediction markets. TheLines reported on October 19 that Kalshi chief executive Tarek Mansour has warned the industry could leave the United States if states succeed in regulating the platforms.

The conflict centres on whether sports event contracts belong under federal derivatives oversight or state gambling rules. The Commodity Futures Trading Commission (CFTC) currently oversees prediction markets under the federal Commodity Exchange Act, while states including Michigan argue that sports contracts should be treated like sportsbook wagers.

Federal authority versus state gambling rules

On prediction exchanges, traders can buy or sell shares tied to the outcome of a championship or an individual game; player props are also available. States with regulated sports betting contend that platforms offering these markets are operating like sportsbooks without being subject to equivalent state rules.

Kalshi and other prediction-market operators take a different position. They argue that the contracts are swaps rather than traditional bets, and that their economic consequences bring them within the CFTC’s federal remit. That legal disagreement underpins the wider jurisdictional fight over prediction markets.

A state-by-state approach could mean operators confronting different requirements across the country, rather than a single federal framework. Mansour has argued that uniform federal rules would be preferable to a fragmented patchwork, but the eventual shape of any such regime remains unsettled.

Mansour’s warning and the state response

Speaking at DC Fintech Week 2026, Mansour expressed confidence in Kalshi’s position in its ongoing legal challenges. He also acknowledged that if state regulators prevail, prediction-market operators could move their business offshore rather than continue under state control.

His warning makes the jurisdictional question material beyond the courtroom: the outcome could affect where platforms operate and which customers can access their sports markets. The company’s position is that federal oversight provides the route to a consistent national market; states’ objections reflect their view that sports contracts fall within gambling regulation.

Michigan has pursued one of the most active state-level challenges and filed suit against Kalshi in March. Kalshi has since geofenced its sports markets away from Michigan customers, a restriction model the source says has also been used in other states.

Coinbase, meanwhile, paused its sports event contracts in Michigan after reaching an agreement with state gaming regulators. The separate decision illustrates how state-level disputes can affect product availability even while the broader question of federal authority remains contested. The dispute over sports contracts is therefore also an operational issue for platforms and their customers.

Illinois win leaves wider questions open

In the Illinois case, federal district court Judge Martha Pacold ruled that the CFTC, rather than state regulators, oversees prediction markets, preventing Illinois from imposing its own gambling rules on Kalshi. The ruling gives the company a legal win, but does not settle the nationwide dispute.

TheLines reported that the ultimate decision over the regulatory status of platforms such as Kalshi, Polymarket and Underdog could lie with the US Supreme Court. The same report noted that platforms could still face state tax obligations on future profits despite Kalshi’s Illinois victory.

The potential commercial reach of the dispute extends beyond market access. Kalshi has partnership deals with Madison Square Garden and multiple sports franchises, including five Major League Baseball teams. An offshore operation could avoid scrutiny from state gaming authorities such as the New Jersey Division of Gaming Enforcement and the Pennsylvania Gaming Control Board, although the precise implications for the company’s US business remain unresolved.

The next decisive question is whether the industry continues under federal oversight or faces broader state control. For operators, the Illinois decision and Michigan restrictions leave that question live across both litigation and market access.