Sixth Circuit joins growing judicial consensus against Kalshi

Better Markets filed its brief on a Tuesday. By Friday, the Sixth Circuit had handed Kalshi its latest loss, and the architecture of federal preemption that the company had spent years constructing was sitting in the rubble of six consecutive appellate decisions.

The ruling itself follows the logic that has now become almost mechanical across the circuits: Kalshi's event contracts are gambling, the CFTC's authority to regulate commodity futures does not extinguish a state's authority to regulate gambling, and the company cannot use its federal registration as a shield against state enforcement. Better Markets, the advocacy group that filed the brief, framed this as settled ground. At this point, six courts have agreed with them.

That number deserves a sentence. Six appellate panels, across different circuits, with different compositions, looking at the same statutory question and arriving at the same answer. Consensus this durable usually means one of two things: the law is genuinely clear, or every court is making the same interpretive mistake. The second possibility is theoretically available. It is not where the weight of the evidence sits.

The conventional read of this story is that Kalshi is losing. That is accurate but incomplete. What Kalshi is actually doing is building a record for Supreme Court review, and losing six times in a row is not, in that strategy, unambiguous failure. You need circuit splits for certiorari, or you need a legal question so consequential that the Court takes it without one. The preemption question here is genuinely consequential — it touches not just prediction markets but the broader boundary between federal commodity regulation and state police powers over gambling. Kalshi's lawyers know this. The en banc petition already filed is not an act of desperation; it is a procedural step in a longer campaign.

The difficulty is timing. Markets operate in real time. Legal campaigns operate in years. Every quarter that passes under state enforcement pressure is a quarter in which Kalshi cannot freely expand the contracts that generate its revenue. The Sixth Circuit ruling extends that pressure into another jurisdiction. And the company cannot price the Supreme Court option with any precision, because cert is not guaranteed, and a grant would not arrive quickly.

What the reporting has not yet fully connected is what this means for Polymarket, which is fighting a structurally different but legally adjacent battle in New York. Both companies are now operating under the same fundamental judicial holding: federal registration does not preempt state gambling law. The mechanisms differ — Kalshi is a CFTC-registered exchange, Polymarket operates offshore with US-facing exposure — but the underlying legal logic bearing down on both of them is now six circuits deep.