Former Commodity Futures Trading Commission and Securities and Exchange Commission chair Gary Gensler filed an amicus brief with the U.S. Court of Appeals for the Sixth Circuit, aligning with states that argue the Commodity Futures Trading Commission lacks authority to preempt state gambling laws with federally sanctioned prediction markets. The filing positions one of crypto’s most assertive past regulators on the side of states and tribal governments challenging a CFTC-blessed market structure, a clash that matters for crypto-adjacent event markets and the automated trading systems that interact with them.

Background to the case

Gensler’s brief contends that when Congress passed the Dodd-Frank Wall Street Reform and Consumer Protection Act in 2010, it did not authorize nationwide sports wagering through the derivatives framework. He argues the law was crafted to address systemic risks in swaps markets after the 2008 crisis, not to create a federal sports-betting regime that overrides state gambling rules. The filing underscores that state gaming laws “still stand,” pushing back on claims that exchange-listed event contracts fall exclusively under the CFTC’s jurisdiction.

The legal dispute centers on Kalshi’s appeal in the Sixth Circuit after U.S. District Judge Sarah Morrison denied the platform’s request for a preliminary injunction against state cease-and-desist orders. On June 12, 2026, gaming attorney Daniel Wallach noted that “Thirty Native American tribes and 11 tribal associations” submitted an amicus brief supporting Ohio’s position in the appeal, signaling broader state and tribal resistance to federal preemption of gambling regulation through event-based derivatives.

Gensler’s brief arrived alongside other amici backing the State of Ohio, including the Indian Gaming Association, the American Gaming Association, and Better Markets. Among the state voices aligned with Nevada was the Utah Attorney General, representing a state where sports betting is outlawed entirely. The coordinated filings highlight a widening front of state, tribal, and industry stakeholders contesting the jurisdictional reach asserted over prediction markets.

Legal framing and policy signals

Gensler, who chaired the CFTC from 2009 to 2014 and helped negotiate Dodd-Frank, emphasized that lawmakers were focused on credit-default and interest-rate swaps during the post-crisis overhaul. He said he testified in Congress repeatedly, and that neither party sought to grant his then-agency the authority to regulate sports betting. The amicus brief echoes the Supreme Court’s admonition that Congress does not “hide elephants in mouseholes,” arguing that any attempt to upend or preempt a large, established state-regulated gambling industry would not be tucked into a narrow definitional clause of a financial reform statute.

The filing also intersects with an ongoing policy debate at the CFTC. A new 267-page proposal would allow certain sports-related event contracts while prohibiting markets tied to war, assassination, and particular injury- or referee-related outcomes. Gensler opposes the initiative, saying it attempts to reverse a prohibition the CFTC adopted around 2011 on contracts referencing “assassination, war, terrorism, gaming or unlawful acts.” Citing the agency’s shrinking workforce as well as concerns around youth gambling and addiction, he argues issues of gambling access and consumer protections are best handled at the state level—“Let the states do it.”

AI integration

While the dispute is legal at its core, it carries practical consequences for the technology stack that underpins modern markets. Event-contract venues—whether traditional or crypto-adjacent—rely on automated systems for matching, risk controls, surveillance, and settlement logic. The boundary between federally regulated derivatives and state-governed gambling influences how platforms architect these systems, how data pipelines interact with compliance checks, and how algorithmic strategies ingest and respond to market signals. State-by-state regimes tend to demand granular geofencing, age-gating, and responsible-gambling tooling, all of which shape how automated trading and decision-support systems are deployed in production environments.

In crypto markets specifically, where on-chain settlement, wallet-based access, and programmable contracts are common, the classification of event-based products has design and operational implications. Platform operators, market makers, and analytics providers build to the applicable rule set. Clarity over whether certain event contracts are permitted as derivatives or prohibited as gambling drives decisions about user onboarding, data retention, and transaction monitoring—areas where automation and machine-led controls are standard practice.

Technology use case

Prediction markets occupy a space at the intersection of finance, data, and market microstructure. The core technology enables users to trade contracts that reflect the probability of real-world outcomes. Whether these instruments sit under derivatives law or gambling law affects core workflows, from how price-discovery engines and liquidity mechanisms are configured to where and how users can access markets. For crypto-aligned platforms experimenting with tokenized event exposure or integrating external data feeds, the regulatory line shapes how smart-contract logic, oracles, and front-end controls must be implemented to remain compliant across jurisdictions.

Automation is not limited to trading. Compliance, too, is software-driven: identity verification, transaction screening, and behavioral monitoring typically run as continuous, rules-based processes. If state rules govern access and advertising, platforms must embed those constraints in code. If federal derivatives rules apply, surveillance and reporting routines are calibrated to futures and swaps obligations. The outcome of the current litigation will inform which rulebook those systems read from.

Market impact

The legal fight extends beyond one platform. Sixteen states are engaged in proceedings with prediction market operators, and Minnesota has banned such markets by making it a felony to operate or advertise one. In response to state actions, the CFTC has taken the unusual step of suing six states to defend what it describes as its exclusive jurisdiction over these products. The White House under President Donald Trump has publicly sided with the federal position, calling the issue “critically important,” and the CFTC and Department of Justice jointly sued Minnesota shortly after Governor Tim Walz signed the state’s prediction market ban into law.

For crypto participants, the immediate effect is uncertainty about where event-based products fit. Platforms exploring event contracts must weigh the risks of federal-versus-state oversight, and automated liquidity provision or cross-venue strategies are constrained by geographies and marketing limitations. In this environment, system design emphasizes configurability—toggling features, user eligibility, and product availability in line with jurisdiction-specific rules—until a clearer framework emerges from the courts and regulators.

Industry response

The amici filings underscore the breadth of opposition to expansive federal claims. Wallach noted that the tribal brief highlights Kalshi’s reliance not only on Dodd-Frank but also on the Commodity Futures Modernization Act of 2000 and the CFTC Act of 1974 to ground its assertion of exclusive federal jurisdiction. That framing invites the major-questions doctrine, which generally requires explicit congressional authorization for significant expansions of agency power. Against this backdrop, state regulators, tribal governments, and gaming groups are pressing the courts to reaffirm state primacy over gambling, while the federal side frames the contracts as legitimate derivatives subject to CFTC oversight.

Gensler’s posture adds a layer of complexity for the crypto industry. As SEC chair, he led one of the most aggressive crypto enforcement campaigns in the agency’s history, bringing roughly 100 actions and characterizing the sector as “a field that was built up around noncompliance.” Now, in the prediction markets battle, he is siding with states against a CFTC-acknowledged market, arguing that Congress never intended the swaps regime to authorize sports betting. However the Sixth Circuit rules, technology teams building event-related products—and the AI-driven controls around them—will be calibrating their systems to match the legal boundaries that ultimately take shape.