Kalshi's response in the New Jersey case is now due November 9, pushing any decision on whether the justices take the case toward the end of the year.
The legal fight over whether states can regulate sports event contracts is moving toward the Supreme Court on a slower clock than some traders had expected.
The Court's docket for the case, No. 26-299, shows New Jersey filed its petition asking the justices to take up the dispute with Kalshi on September 2. Kalshi's response was originally due October 8. An order on September 22 extended that deadline to November 9.
The same day, the National Council of Legislators from Gaming States filed an amicus brief, adding the voice of state lawmakers who oversee gambling to the case. The Court has taken no action on whether to hear it.
How the timeline narrows the odds
The procedural calendar matters because of how the Court handles petitions. Once a response is filed, the petitioner typically has time to reply, and the case is then distributed for one of the justices' private conferences, usually a couple of weeks later. With Kalshi's brief not due until November 9, the earliest realistic conference falls in late November or December.
That sequence effectively rules out a decision to take the case before the end of October and makes even a December ruling tight.
What the market is pricing
Polymarket runs a contract on whether the Supreme Court accepts a sports event contract case by set dates. The December 31 outcome trades at 34%, on about $986,000 in volume. Given the calendar, that price reflects less a judgment on the merits than a bet on whether the Court moves quickly once briefing closes.
The contract is a wager on a procedural step, whether the justices agree to hear the case, not on how they would rule.
The road to this point
New Jersey sought two extensions before filing. Justice Samuel Alito granted the first on July 1, moving the deadline to August 4, and a second on July 24, moving it to September 3. The state filed a day early.
Why the case matters
A grant of review would set up the first Supreme Court test of whether federal commodities law shields prediction markets from state gambling rules. That question hangs over every sports contract Kalshi and Polymarket list, and over state enforcement actions such as New York's new lawsuit against Polymarket. The Court opens its new term on October 5, but on this case, the decisive date is November 9.