Does federal law preempt state control of prediction markets?
Will the U.S. Supreme Court ultimately hold that federal law (the Commodity Exchange Act and the CFTC's jurisdiction) preempts state gambling regulation of sports-event prediction-market contracts, resolving the Third Circuit/Ninth Circuit split in favor of federal preemption rather than state authority?
Essentially unchanged — still close to a coin flip on the merits; this week's activity (Robinhood's cert petition, Kalshi's en banc bid, the cert-grant tracker easing to 45%) is about timing and vehicles, not the underlying legal question
The preemption case rests on the Third Circuit's own reasoning (2-1, but the CEA's broad swap definition was central to it), the CFTC's public position that its jurisdiction is exclusive, and analysts like TD Cowen's Seiberg who expect the agency to ultimately prevail even if the timeline runs into 2027. The state-authority case has the more recent, unanimous Ninth Circuit precedent, and a concrete compliance action behind it: Robinhood's decision to pause new Nevada sports contracts rather than fight through the injunction process shows operators are treating the Ninth Circuit ruling as the operative law in the meantime. Both sides note these are preliminary-injunction rulings, not final merits judgments, so the Supreme Court could still decline to intervene and let a fuller record develop first — this is a genuinely slow-moving docket, not a stalled one, since the underlying stakes and filing activity keep escalating even without a merits ruling in sight.
No fixed date · Supreme Court review — cert not yet granted; New Jersey's petition was filed Sept 2 and a conference is expected this fall
No new merits-level filings surfaced today beyond Sept 9's dual filings (Robinhood's SCOTUS cert petition, Kalshi's Ninth Circuit en banc bid) — this docket now sits waiting on responses, which aren't due for weeks. The one number that moved is a related-but-distinct market: Polymarket's cert-grant-by-Dec-31 tracker eased further to roughly 45%, down from 52% a week ago, even as two petitions are now pending instead of one. That's a signal about pace, not about how the merits would ultimately break — a slower path to a hearing doesn't change the Third Circuit/Ninth Circuit reasoning once the Court does engage. Kalshi's response to New Jersey's original Flaherty petition is still not due for weeks, so the underlying probability genuinely hasn't moved on new information today.
The two circuits that have ruled reached opposite answers to the same legal question — the contracts are either federally preempted swaps or state-regulable bets — and only a Supreme Court ruling on the merits settles which one it is nationally, though cert has not yet been granted and the timing is entirely at the Court's discretion.
Researched Sep 11, 2026 · tracked since Sep 3, 2026 · 7 readings
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Federal law preempts state controlthis is “yes”
The Supreme Court eventually adopts the Third Circuit's reasoning that sports-event contracts are CEA swaps under the CFTC's exclusive jurisdiction, letting Kalshi, Robinhood and other CFTC-registered platforms keep operating nationally under one federal framework rather than a state-by-state patchwork.
Worth knowing: This is genuinely a 'close call' per TD Cowen, cert hasn't even been granted yet, and the more recent of the two rulings (Ninth Circuit, unanimous) went the other way — don't treat the Third Circuit's head start as a durable lead.
States retain gambling authority
The Supreme Court adopts the Ninth Circuit's reasoning that these are ordinary sports bets Congress never intended to federalize, letting states enforce their own licensing and gambling laws against Kalshi-style platforms the way they do against any sportsbook.
Worth knowing: The Third Circuit's preemption ruling is real, current precedent in some jurisdictions and squarely conflicts with this reasoning — a full merits case, rather than the preliminary-injunction posture both rulings so far have been decided in, could land differently.
10 sources, leaning both ways
- mixedCNBC — New Jersey asks the Supreme Court to take on prediction marketsSept 2: reports New Jersey's certiorari petition in Flaherty v. KalshiEX, the first time this dispute has reached the Supreme Court, and that the Court will likely decide later this fall whether to hear it.
- noCNBC — U.S. appeals court rules against prediction markets, sets up likely fight at Supreme CourtAug 28: the Ninth Circuit's unanimous 3-0 ruling that Kalshi's sports-event contracts are not swaps and Nevada can regulate them as gambling, denying Kalshi, Robinhood and Crypto.com injunctive relief.
- yesJustia — KalshiEX LLC v. Flaherty, 3rd Cir. (April 6, 2026)Primary source — the Third Circuit's 2-1 opinion holding Kalshi's contracts are swaps under the CEA and New Jersey's gambling laws are preempted, the ruling New Jersey is now asking the Supreme Court to reverse.
- mixedBloomberg Law — Prediction Market Law Keeps Veering, Inviting Supreme CourtQuotes Morgan Lewis' Rob Schwartz (former CFTC general counsel) framing the circuit split as a genuine clash between the CEA's literal text and Congress's gambling-regulation intent — 'the Supreme Court will have to intervene.'
- yesBloomberg — Robinhood's Prediction Market Growth Makes Morgan Stanley a BullSept 1: Morgan Stanley upgrades Robinhood to overweight ($150 target) explicitly citing prediction-market revenue growth despite the Ninth Circuit loss three days earlier — a bet the legal risk to the federal framework is overstated.
- mixedSportico — Federal Circuits Split on Kalshi-Nevada Ruling, SCOTUS Likely to ReviewTD Cowen's Jaret Seiberg: 'The only question is whether the justices take the case this fall or wait until next year for final rulings. We give the CFTC the edge, though it is a close call.'
- noReason — Kalshi says it's a prediction market. The 9th Circuit says it's gambling.Sept 1: reports Robinhood pausing new sports event contracts in Nevada per a Gaming Control Board notice, while confirming plans to appeal — the first concrete operational retreat tied to the Ninth Circuit ruling.
- mixedCasino Beats — Polymarket Gives 52% Chance of Supreme Court Hearing Prediction Market CaseThe cert-grant market jumped from 29% to 52% after the Ninth Circuit ruling, with a separate contract giving just 6% odds the Court grants cert before Oct 31 — a distinct question from the merits this topic tracks, but the clearest sign yet the dispute is expected to actually reach the Court.
- mixedPolymarket — SCOTUS accepts sports event contract case by...?Checked Sept 11: crowd assigns roughly a 45% chance to SCOTUS accepting the case by Dec 31, 2026, down from 52% a week earlier despite two petitions now pending (Robinhood's cert bid, New Jersey's Flaherty petition) — the cert-grant question and the merits question continue to move somewhat independently.
- mixedCoinGape — Kalshi Petitions for En Banc Rehearing in Nevada Sports Prediction Markets CaseSept 9: Kalshi petitions the Ninth Circuit for en banc rehearing, arguing the panel's ruling lets states regulate CFTC-approved contracts even though the same panel found the CFTC has exclusive jurisdiction over derivative-exchange instruments — a contradiction Kalshi says exposes it to liability despite federal compliance. Robinhood separately filed its own SCOTUS cert petition the same day, a 'tag-team strategy' per legal analyst Daniel Wallach.