Prediction Markets Lose Again as Michigan Judge Blocks CFTC Shield

⏱ 3 min read

A federal judge in Michigan handed state gambling regulators a major courtroom win on June 17, 2026, denying Polymarket and Robinhood the preliminary injunctions they needed to keep operating sports-event prediction contracts in the state. U.S. District Judge Paul L. Maloney of the Western District of Michigan ruled that sports-outcome contracts do not qualify as federally regulated "swaps" under the Commodity Exchange Act, rejecting the companies' core claim that the Commodity Futures Trading Commission (CFTC) — not state gambling regulators — holds jurisdiction over their products.

The decision is the latest and most legally detailed blow in a war that now spans more than a dozen states. The American Gaming Association (AGA) estimates states have lost nearly $1 billion in gambling tax revenue since the start of 2025 as bettors shifted volume to prediction platforms. With the Sixth Circuit Court of Appeals set to hear arguments on the same jurisdictional question on July 30, 2026, and the outcome potentially destined for the U.S. Supreme Court, the ruling has direct consequences for every licensed operator, tribal government, and bettor in regulated markets.

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What the Court Decided

Judge Maloney issued nearly identical rulings against Polymarket (operating as QCX LLC) and Robinhood on the same day. Both companies had argued their sports-event contracts were "swaps" — a category of federally regulated financial derivative defined under the Dodd-Frank Act of 2010. If classified as swaps, the products would fall under exclusive CFTC oversight, shielding them from state gambling enforcement nationwide.

Maloney rejected that framing. In the opinion, he wrote that Polymarket's reading of the derivatives definition "would encompass vast swaths of activity never understood to be associated with the financial industry and instead traditionally associated with core state, as opposed to federal, responsibilities." He also invoked a U.S. Supreme Court precedent — Bond v. United States — requiring that Congress provide a clear statement before federal law overrides the states' traditional role in regulating gambling. No such statement exists in Dodd-Frank, the judge concluded.

The ruling does not terminate either lawsuit. It denies emergency relief, meaning Michigan Attorney General Dana Nessel and the Michigan Gaming Control Board can now proceed with enforcement action against both platforms while the underlying cases continue.

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Why It Matters for Operators and Bettors

For licensed sportsbooks and online casinos, the financial stakes are not abstract. The AGA warned in late May that states and tribes have lost close to $1 billion in gaming tax revenue since January 2025 because of volume diverted to prediction market platforms that pay no state gaming taxes. AGA President and CEO Bill Miller put the issue directly on CNBC, citing 41 state attorneys general from both parties who have said the CFTC has no business serving as the national regulator for sports wagering.

For bettors, the practical effect varies by state. The ruling means Michigan residents cannot currently access Polymarket's sports markets. It also creates regulatory uncertainty for Kalshi, which faces a separate lawsuit from Michigan over the same product category. Operators in regulated markets have argued prediction platforms exploit an unlevel playing field — accessing bettors in states like California, Texas, and Florida where traditional sportsbooks cannot yet legally operate.

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A Live Circuit Split Heading for Appeal

The Michigan decision deepens a genuine circuit split that is accelerating toward appellate review. Within the Sixth Circuit alone — which covers Michigan, Ohio, Kentucky, and Tennessee — lower courts have reached directly opposing conclusions.

Court / State	Date	Ruling	Outcome for Prediction Markets
W.D. Tennessee (Kalshi)	Feb 2026	Sided with CFTC / prediction markets	Favourable — contracts likely federal swaps
N.D. Ohio	Mar 2026	Sided with state regulators	Adverse — state gambling law applies
Nevada Gaming Control Board	Early Jun 2026	Court order enforcing state ban	Adverse — Polymarket blocked statewide
W.D. Michigan (Polymarket, Robinhood)	17 Jun 2026	Sided with state regulators	Adverse — injunctions denied, enforcement open

The Sixth Circuit Court of Appeals is scheduled to hear oral arguments in the Tennessee case on July 30, 2026. Legal observers widely expect the matter to reach the U.S. Supreme Court before a definitive national answer emerges.

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Industry Coalition Pushes Congress to Act

Parallel to the court fight, a broad industry coalition sent a letter to the U.S. Senate this week urging lawmakers to close the prediction market loophole through federal crypto legislation. Signatories included the AGA, the Indian Gaming Association, the Association of Gaming Equipment Manufacturers, the AFL-CIO's Hotel and Gaming Trades Council, and workers' union UNITE HERE. Their target: the Clarity Act, a cryptocurrency market structure bill currently awaiting a Senate floor vote.

The coalition letter argued that prediction markets have enabled the largest expansion of unregulated gambling in years without approval from voters or state legislatures, and that the CFTC was never designed to police national sports wagering. A standalone legislative alternative — the Prediction Markets Are Gambling Act, introduced in March 2026 by Sen. John Curtis and Rep. Adam Schiff — also remains active but has not advanced.

Prediction market platforms are not sitting still. Polymarket is fighting in Massachusetts and Minnesota. Minnesota became the first state to pass a law outright banning prediction markets in June, prompting Polymarket to sue Gov. Tim Walz and Attorney General Keith Ellison. Meanwhile, Fanatics Markets and ADI Predictstreet — FIFA's official prediction market partner — launched a co-branded World Cup hub on Crypto.com across 23 states, including California and Texas, explicitly to reach bettors where traditional sportsbooks cannot operate legally.

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What Comes Next

Several overlapping timelines will shape the next chapter of the prediction market battle:

• July 30, 2026 — Sixth Circuit oral arguments in the Tennessee (Kalshi) case; the first appellate-level hearing on the federal-versus-state jurisdiction question.
• Senate floor vote (date TBC) — The Clarity Act, if amended to include a prediction market sports-contract ban as the coalition demands, would resolve the question legislatively without waiting for courts.
• Maine iGaming launch (late 2026 / 2027) — Maine is set to become the eighth state with full legal online casinos, with DraftKings and Caesars among likely launch partners.
• Ongoing enforcement — Michigan, Nevada, Minnesota, Massachusetts, and others are actively pursuing or poised to pursue enforcement actions while litigation continues.
• AGA April 2026 data — The latest monthly tracker shows U.S. commercial gaming revenue up 9.8% year-over-year to a new April record, with iGaming generating $1.00 billion for the month and sports betting revenue up 21.1% to $1.49 billion — underlining how much regulated tax revenue is at stake in the jurisdictional fight.

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Sources

Reporting draws on the original court ruling, primary AGA data, and coverage verified across four independent outlets.

Plaintiff's vision of the scope of derivatives is so vast that it would encompass vast swaths of activity never understood to be associated with the financial industry and instead traditionally associated with core state, as opposed to federal, responsibilities.

— Judge Paul L. Maloney, U.S. District Court, Western District of Michigan · Ruling on Polymarket preliminary injunction, June 17, 2026