Gensler Hands States Ammo Against Prediction Markets

Late Thursday, Gary Gensler turned the sports prediction-market fight into a direct challenge to federal preemption, arguing that CFTC oversight does not give platforms a national pass around state gaming law.

Late Thursday Filing Puts Kalshi’s Ohio Fight at the Center of the Preemption War

Gensler, the former chair of both the Commodity Futures Trading Commission and the Securities and Exchange Commission, filed an amicus brief with the Sixth Circuit Court of Appeals in a case involving KalshiEx, better known as Kalshi, according to CoinDesk. The brief argues that federal commodities law does not authorize the CFTC to oversee sports-linked prediction markets as swaps.

The timing matters because Kalshi is already fighting Ohio. The company filed preemptively against the state, seeking to stop Ohio from suing it. A federal judge ruled against Kalshi in March, and the appeal now sits inside a wider national dispute: are sports event contracts federally regulated derivatives, or are they sports gambling under another name?

Gensler’s view carries unusual weight here. He chaired the CFTC from 2009 to 2014, when the agency implemented Dodd-Frank, and later chaired the SEC from 2021 to 2025. His argument is not that prediction markets cannot exist. It’s narrower and sharper: Congress did not silently convert sports betting into a federally protected derivatives product.

"Congress did not include sports betting contracts within the statutory Dodd-Frank definition of swap," the brief said. "Such contracts do not fit the CEA’s purpose or the statutory language defining swap, which focus on hedging economic risk. Sports bets are very rarely, if ever, about hedging."

XOOMAR analysis: that line attacks the industry’s strongest legal shield. If a sports contract is not a swap, CFTC registration may not block state gambling enforcement.

March Loss in Ohio Exposed the Weak Spot in Sports Event Contracts

Prediction markets can cover elections, economic releases, weather, awards, sports results, and other outcomes. The legal friction spikes when the contract references a game.

The industry’s pitch is straightforward: these are event contracts traded on regulated venues, with prices reflecting market expectations. The state response is just as direct: when users stake money on sports outcomes and win or lose based on the result, the product looks a lot like sports betting.

That difference matters because state and tribal authorities already regulate gaming activity. CoinDesk reports that the Indian Gaming Association, Native American tribal organizations, the American Gaming Association, and Better Markets also filed friend-of-the-court briefs arguing that sports-related prediction markets infringe on state and tribal regulation.

One tribal filing framed Kalshi’s entry as a direct incursion:

"Kalshi has brazenly entered onto state and tribal lands across the nation to conduct unregulated gaming with its so-called 'legal sports betting' app," the filing said. "In doing so, Kalshi is siphoning away vital tribal and state governmental revenue to its owners’ pockets."

The dispute connects to a broader regulatory boundary XOOMAR has tracked in CFTC Puts Prediction Markets on Notice With First Rule. The question is not whether federal markets can list event contracts. It’s whether sports outcomes belong in that category when the same underlying activity has long been treated as gaming.

April Court Split Shows Why the Supreme Court May Be Pulled In

The courts are already divided. CoinDesk reports that the Third Circuit Court of Appeals ruled in April that New Jersey could not shut down prediction markets. A Ninth Circuit Court of Appeals panel, by contrast, appeared more inclined toward the states.

That split is why this case is bigger than Kalshi and Ohio. If the CFTC’s view wins, states could lose significant tax revenue, according to CoinDesk. If the states win, prediction-market providers may need to register and comply in each state where they operate, and could face criminal penalties in some jurisdictions for running unregistered platforms.

The CFTC, now led by Chair Mike Selig, filed its own amicus brief last month. Its position: any event contract traded by a designated contract market overseen by the regulator is a swap. Gensler rejects that reading.

His brief also leans on political reality, not just statutory parsing:

"To put the argument in the plainest real-world terms: Senate Majority Leader Harry Reid of Nevada would never have consented to or passively accepted legislation displacing an activity so critical to his state’s economy and politics by permitting sports betting only under CFTC auspices," Gensler's brief said.

That is the federalism argument in plain English. Congress can preempt state gambling law. Gensler says it did not do so here.

The Hard Numbers Are Legal Milestones, Not Market Size Claims

The supplied record does not provide national sports-betting handle, operator revenue, or state tax receipts. So the honest data section is this: the measurable facts in this fight are procedural and statutory, not market-sizing.

A related supplied source says 39 states have adopted sports betting legislation and launched legal and licensed sportsbooks since the 2018 fall of PASPA. That number explains why states are unlikely to surrender this field through silence. They built state-level systems after the federal ban fell. Prediction markets now argue that a different federal framework can sit above those systems.

XOOMAR analysis: the regulatory-arbitrage issue is obvious even without handle figures. If a sports outcome contract functions like a wager but avoids state registration and state tax structures, the economic incentive for platforms is substantial. The court does not need a market-size chart to see why states and tribes are fighting.

Tribal Groups, Gaming Firms, Better Markets, and the CFTC Are Now in Open Conflict

The briefs divide the stakeholders cleanly.

Gensler and Better Markets argue that sports contracts do not belong inside the Dodd-Frank swaps framework because they lack the hedging function Congress had in mind. Better Markets also cited prior Kalshi filings that distinguished political event markets from sporting events such as horse races, according to CoinDesk.

The American Gaming Association attacked the claimed distinction between prediction markets and sports betting. Its filing cited a Kalshi trademark application saying its services are associated with "providing of information related to sports betting; organizing, arranging, conducting sports betting and gambling tournaments, competitions and contests."

Tribal organizations focused on sovereign rights and the Indian Gaming Regulatory Act, arguing that gaming on native lands must benefit tribes rather than private firms.

The CFTC is taking the opposite side. It says broad statutory language allows CFTC-regulated firms to offer these products when traded on a designated contract market.

For users, the immediate stakes are product access and legal certainty. For sportsbooks, the risk is a federally framed rival product category that may not carry the same state-by-state obligations. For fintech and crypto-adjacent builders, the warning is blunt: labels can buy time, but they don’t erase the underlying activity.

That same tension runs through broader financial-regulation debates, including whether Congress should write clearer rules instead of leaving markets to agency discretion, as discussed in Hill Says Crypto Bill Needs Law, Not Regulator Mercy.

The Next Decision Point Is Whether Courts Treat Sports as Risk Transfer or Gaming

The likely path is messy because the source record already shows parallel pressure: state lawsuits, platform preemptive suits, CFTC amicus filings, and appellate splits. CoinDesk says the Supreme Court will likely take up the issue, and Congress is also examining it.

A ruling for the CFTC would strengthen the national model for sports event contracts. A ruling for states would force prediction-market providers into local registration and compliance fights, or push them to limit where and how they list sports markets.

The evidence that would confirm Gensler’s thesis is a court holding that sports contracts are not swaps because they do not hedge economic risk in the way the Commodity Exchange Act contemplates. The evidence that would weaken it is a higher-court ruling that broad Dodd-Frank language covers event contracts even when the event is a game.

If Gensler’s position gains traction, prediction markets won’t vanish. But sports contracts would face the same hard truth as sportsbooks: in the U.S., gambling law still runs through the states unless Congress clearly says otherwise.

Disclaimer: This XOOMAR analysis is for informational and educational purposes only. It is not financial, investment, legal, tax, or professional advice. It does not provide buy, sell, hold, price-target, portfolio, or personalized recommendations. Verify information independently and consult qualified professionals before making decisions.

Impact Analysis

• The case could shape whether prediction markets can operate nationwide without complying with state gambling laws.
• Gensler’s brief challenges a key legal argument used by platforms offering sports-linked event contracts.
• The outcome may influence how courts separate federally regulated derivatives from state-regulated sports betting.