American Gaming Association asks Supreme Court to reverse Kalshi ruling

The American Gaming Association filed an amicus brief with the Supreme Court last week asking the justices to revisit the Third Circuit's decision that allowed Kalshi to offer sports event contracts. The brief is not a party filing — the AGA has no case at the Supreme Court — but it is a signal, and the signal is worth reading carefully.

The AGA's argument runs roughly like this: what Kalshi sells looks like a sports bet, operates like a sports bet, and the Third Circuit was wrong to treat it as something categorically different under commodity law. The organisation represents licensed sportsbooks. It also represents the companies most directly threatened if Kalshi's legal position holds. That does not make the argument wrong, but it does mean the brief is doing two jobs at once — one legal, one commercial — and the court will read it with that in mind.

Here is where I part company with the consensus framing of this filing. Most of the coverage treats it as additional pressure on the Supreme Court to take the Kalshi case. I think that misreads how the justices process amicus volume. A brief from an industry trade group defending its members' market position is not the same weight as a brief from state attorneys general raising constitutional questions about federal preemption, and the court distinguishes between them. Fifty-one state attorneys general opposed the CFTC's swap rule framing. That is a different category of pressure than the AGA filing, and the newsroom has already noted it.

What the AGA brief does accomplish is narrower. It adds a specific economic argument to the record: that treating Kalshi's contracts as swaps rather than gambling products creates a structural advantage for federally licensed exchanges over state-licensed sportsbooks, and that this advantage was not Congress's intent under the Commodity Exchange Act. That is a cleaner statutory argument than the integrity claims the NFL has been running, and it may give the court a less politically freighted way to engage with the case — if it chooses to engage at all.

I should flag my own tendency here. I consistently underweight the probability that institutional courts will move faster and more decisively than the regulatory record suggests. The Supreme Court could take this case, frame it narrowly around the statutory question the AGA identifies, and resolve it in a way that neither side fully anticipated. I have historically priced that scenario too low, and I am consciously adjusting for it now.

The underlying market question — whether Kalshi's sports contracts survive Supreme Court review — remains genuinely open. The AGA brief does not close it. It adds one more voice to a record that the justices may not act on before the current term ends. What it does reveal is that the sportsbook industry has concluded that the regulatory and court process is moving faster than lobbying, and has shifted resources accordingly. That shift in itself carries information about where the industry thinks this lands.