The Deadline Was Thursday

14 October 2026. Dockets, filings and deadlines are as of the dates stated in the text.

Interest disclosure: T-Kalshi is a tokenized loan participation right providing economic exposure linked to Kalshi's pre-IPO valuation, issued through a dedicated issuing subsidiary. T-OpenAI is issued on the same basis. T-SpaceX, issued through its own dedicated issuing subsidiary, provides economic exposure linked to SpaceX; following the SpaceX listing, the investment underlying T-SpaceX is being divested. Redemption opens only once a Redemption Start Date is announced, and as of 14 October 2026 none has been. Tessera's founder, and entities he controls, hold related exposure. This piece is about Kalshi, the respondent to New Jersey's petition, and about two firms that have petitioned on the same legal question: Robinhood, which says it "facilitated trades on KalshiEX" when it brought its case, and North American Derivatives Exchange, which trades as OG.com Prediction Markets and as Crypto.com | Derivatives North America. Tessera has no product, listing or arrangement linked to Robinhood or to North American Derivatives Exchange. Tessera has a commercial interest in Kalshi being interesting, and in how this question comes out for it. Read what follows with that in mind.

Tessera's piece of 21 September, Seventy-Eight, was about the Senate's vote on the CLARITY Act, and its last section opened with a date from the docket of New Jersey's Supreme Court petition against Kalshi, No. 26-299: "8 October, unless the motion filed on 18 September moves it. And then nothing scheduled." The motion did move Kalshi's response, to 9 November. It could not move a second deadline that fell on the same day. That one is set by the Court's rules rather than shown on the docket, and the 21 September piece did not mention it.

Under the Court's Rule 37.2, a brief supporting a petitioner at this stage "shall be filed within 30 days after the case is placed on the docket or a response is called for by the Court, whichever is later, and that time will not be extended." The petition was placed on the docket on 8 September. Counting under Rule 30.1, thirty days on is Thursday 8 October.

Tessera's piece of 30 September noted one amicus brief, from the National Council of Legislators from Gaming States. There are now eleven on the docket, and the cover of every one says it is "in support of petitioners". The other ten were entered between 2 and 8 October. As of 14 October, the American Gaming Association's was still marked "submitted" rather than "filed". Besides the legislators' brief, they come from:

• Gaming regulators: the International Association of Gaming Regulators and the North American Gaming Regulators Association.
• Tribes: the Cabazon Band of Cahuilla Indians, and separately 145 Indian tribes and tribal organizations.
• States: Ohio, 38 other states and the District of Columbia.
• Opponents of gambling expansion: Stop Predatory Gambling, the Association of American Physicians and Surgeons and Texans Against Gambling.
• A sports league: the National Football League.
• The gaming industry: the American Gaming Association, and the Casino Association of New Jersey.
• Former officials: former CFTC chairman Gary Gensler, and former Senator Christopher Dodd.

Eleven to none looks like a verdict. Part of it is a calendar.

What the Calendar Explains, and What It Does Not

The same rule sets a different clock for the other side. A brief supporting a respondent "shall be submitted within the time allowed for filing a brief in opposition or a motion to dismiss or affirm." Kalshi's response is currently due on 9 November, so anyone who wants to stand beside Kalshi on New Jersey's petition files on Kalshi's timetable rather than New Jersey's.

The two sides may also be asking for different things. The eleven ask the Court to take the case. Kalshi's response, which the Rules call a brief in opposition whatever it argues, is due on 9 November, and a brief alongside Kalshi at this stage would usually argue against review.

Kalshi is more than a respondent, though. It won in the Third Circuit and lost in the Ninth (28 August) and the Sixth (25 September), all at the preliminary-injunction stage, as Tessera's 30 September piece set out. It may have reasons of its own to want a national answer, and if it petitions from either of those rulings, its supporters get a petitioner's window too.

The industry has an early window of its own. Two firms have petitioned against the Ninth Circuit's decisions in Nevada: Robinhood (No. 26-338) and North American Derivatives Exchange (No. 26-344). Those petitions were docketed on 14 and 15 September, so on the same arithmetic, briefs supporting them are due on 14 and 15 October. As of the morning of 14 October, neither docket showed one. Nevada asked for more time to respond in both cases and got it, on 8 and 9 October: to 16 November on North American Derivatives Exchange's petition and to 13 November on Robinhood's.

Those two petitions do not mirror New Jersey's. North American Derivatives Exchange asks the Court to take the question. Robinhood says that "granting certiorari now would be premature" while the CFTC writes a rule, and asks the Court to grant its petition only if it grants New Jersey's or another petition on the question. Silence on Robinhood's docket this week would therefore say little. North American Derivatives Exchange's petition, which asks for review outright, is the closer comparison with New Jersey's. On New Jersey's petition itself, anyone who backed Kalshi below, including the amici named further down, can file by 9 November.

One thing the calendar does not explain away. At this stage an amicus brief is also how outsiders tell the Court that a question matters, and eleven of them say this one does, whoever is right about the answer.

Read the Interest Section First

Every amicus brief says who the filer is and why it cares. We read those sections as disclosure, which is how we would want this piece read, and the arguments stand or fall on their own.

Some of the interests are sovereign. The states' summary of argument gives four reasons for the Court to act: the prediction markets' theory "infringes state sovereignty by preempting the States' traditional authority", "invokes the major questions doctrine by handing over immense power to a federal regulatory agency", "endangers citizens who will lose protection from important state gambling laws", and "has splintered the circuits and lower courts with no resolution on the horizon." The brief for 145 tribes and tribal organizations says "there is another set of constitutionally recognized sovereigns for whom the question presented is all but existential: Indian tribes", and grounds that in a tribal sovereignty which, it says, "Federal law has long recognized", including through the Indian Gaming Regulatory Act.

Some interests are commercial, and say so. The American Gaming Association's members "have built their businesses around a framework in which state and tribal governments regulate sports betting". The brief says the scheme the Third Circuit's decision allows, prediction markets offering sports betting nationwide without complying with state and tribal gaming laws, "is inflicting serious competitive harm on state- and tribal-licensed gaming operators." The NFL's interest is its product: "The NFL's highest priority is preserving the integrity of its games."

Others are neither. Texans Against Gambling describes itself as "devoted to preventing the expansion of gambling".

That makes a coalition of states, legislators, tribes, regulators, casinos, a sports league and groups opposed to the expansion of gambling. They want different things from gambling policy. What they share, on their covers, is support for New Jersey's petition. The briefs we read argue that Congress did not take sports wagering away from the states, and most say the same of tribal governments on their own lands. None of that makes them right or wrong. It is what an interest section is for.

Who Was There, on Both Sides

Two of the briefs come from people who held office when the law was made. Senator Dodd, by his brief's account, chaired the Senate Banking Committee from 2007 to 2011, and the brief says that "As the Senator who sponsored the legislation, amicus is uniquely qualified to address the meaning and scope of the provisions at issue." His interest section also cites his "longstanding work on issues affecting Connecticut's federally recognized tribes". Gary Gensler, by his brief's account, chaired the CFTC from 2009 to 2014. Both say the Third Circuit misread the statute when it found, at the preliminary-injunction stage, that Kalshi was, in Gensler's words, "likely to prevail". Every appellate ruling described in Tessera's 30 September piece was at that stage.

They are not the only people from 2010 in this case. In the Third Circuit, the opinion lists counsel for amici on Kalshi's side for Max Baucus, Blanche L. Lincoln, Saxby Chambliss, K. Michael Conaway, Collin Peterson, Cheri Bustos and Cindy Axne. The first five voted on the Dodd-Frank conference report in 2010, according to the Senate and House roll calls; Bustos and Axne were not in Congress then. We have not read that brief, so this piece does not characterize it. It does mean the people who were there are on both sides.

The two briefs on New Jersey's side use their authors' presence differently. Dodd's argues first from the statute's text: a sports wager is not a swap, it says, because the definition requires a contingency "associated with a potential financial, economic, or commercial consequence". The record made in 2010 comes in as confirmation. Gensler's leans more on having been there. "The answer—from Amicus as someone who was there—is that Congress did not transfer jurisdiction over sports betting from the States to the CFTC." It says that Harry Reid, the Senate Majority Leader of the day, "would never have consented to legislation displacing an activity so critical to his state's economy and politics by permitting sports betting only under CFTC auspices." And it says Gensler, as chairman, "provided technical assistance in drafting the Special Rule and recalls discussions with Senate Majority Leader Reid's office regarding the inclusion of 'gaming' within the list of activities under the rule."

The Special Rule is part of section 745 of the 2010 Act, and gives the CFTC authority to prevent trading in certain contracts it finds contrary to the public interest, including those involving gaming. Separately, Gensler's brief argues from the text, and from Rule 40.11, which the CFTC finalized in July 2011 and which on Gensler's reading prohibits listing contracts involving gaming. The Commission reads that rule differently: according to North American Derivatives Exchange's petition, the CFTC's June 2026 proposal says the Commission "has consistently applied § 40.11 to operate a discretionary framework rather than a self-executing per se prohibition."

The Court has addressed legislative history written after a law is passed, in a passage answering reliance on a committee report by a later Congress: "Post-enactment legislative history (a contradiction in terms) is not a legitimate tool of statutory interpretation." (Bruesewitz v. Wyeth, 2011.) Of the record made before a vote, the same passage says it is "persuasive to some because it is thought to shed light on what legislators understood an ambiguous statutory text to mean when they voted to enact it into law." Whether the text here is ambiguous is part of what is in dispute. On our reading, the first statement would apply, if at all, to later recollections from either side.

The pre-enactment record the two briefs draw on is a colloquy on the Senate floor on 15 July 2010. Senator Feinstein thanked "Chairman LINCOLN and Chairman DODD" for maintaining section 745 in the conference report, and Senator Lincoln replied: "Chairman DODD and I maintained this provision in the conference report to assure that the Commission has the power to prevent the creation of futures and swaps markets that would allow citizens to profit from devastating events and also prevent gambling through futures markets." Gensler's brief quotes that sentence, with one phrase omitted; Dodd's quotes parts of it. Both briefs also draw on her remark that contracts around sporting events such as "the Super Bowl, the Kentucky Derby, and Masters Golf Tournament" would "not serve any real commercial purpose. Rather, they would be used solely for gambling." New Jersey's side reads that as Congress keeping sports gambling off these markets. The industry's petitions do not cite the floor record in their arguments. They read the provision itself as a power given to the CFTC, and North American Derivatives Exchange argues that reading Rule 40.11 as a categorical bar "only proves that sports-event contracts are swaps."

What Is Not on the Docket

As of 14 October, no amicus brief supporting Kalshi, Robinhood or North American Derivatives Exchange was on any of the three dockets, and there was no filing from the United States. Tessera's 30 September piece concluded that "A national answer has to come from the Supreme Court or from Congress." That is still where it sits. How much weight anyone's later recollection carries is for the Court to decide, and the passage quoted above is the nearest statement from it that we found. A new statute would be a different route.

Where That Leaves the Question

This piece holds no view on who should win, and we are still not qualified to have one. It does not predict that the Court takes the case, and a signal that a question matters is a reason to grant review without being a guarantee of it. The Court's own rules say review "is not a matter of right, but of judicial discretion", and that a petition "will be granted only for compelling reasons."

What changed last week was the docket. The law is where it was. One side's deadline came first, and it brought a coalition broad enough to be worth reading closely. The industry's own first window closes this week. On New Jersey's petition, the other side's window currently runs to 9 November, unless Kalshi petitions itself.

A count of briefs says nothing about a count of votes. It is a list of who has an interest, published in advance by the people who have it, and a signal that the question matters. We find that more useful than the count.

Sources: Supreme Court of the United States, docket No. 26-299, Flaherty v. KalshiEX, LLC, for the docketing date, the extension of Kalshi's response to 9 November 2026, Kalshi's letter of 18 September 2026 requesting it, and the eleven amicus entries, read 10 to 14 October 2026; the cover page of each brief for the party supported. Briefs quoted: Ohio, 38 other states and the District of Columbia (summary of argument); 145 Indian Tribes and Tribal Organizations, the American Gaming Association and the National Football League (interest sections); Stop Predatory Gambling et al.; former Senator Christopher J. Dodd; former CFTC Chairman Gary Gensler. KalshiEX, LLC v. Flaherty, No. 25-1922 (3d Cir. 6 April 2026), as filed on docket 26-299, for the listing of counsel for amici. Dockets No. 26-338, Robinhood Derivatives, LLC v. Dreitzer, and No. 26-344, North American Derivatives Exchange, Inc. v. Nevada, for docketing dates and the extensions granted on 8 and 9 October 2026, read 10 to 14 October 2026; the two petitions for Robinhood's account of its role and its request, and for North American Derivatives Exchange's reading of the provision and its quotation of the CFTC's proposed rule. Congressional Record, 156 Cong. Rec. S5906-07 (daily ed. 15 July 2010). United States Senate roll call vote 208 (15 July 2010) and House of Representatives roll call 413 (30 June 2010), on the conference report on H.R. 4173, for who was in Congress. North American Derivatives Exchange's petition, corporate disclosure statement, for its trading names. Rules of the Supreme Court of the United States (effective 16 March 2026), Rules 10, 30.1 and 37.2; the 8, 14 and 15 October deadlines are our arithmetic from the docketing dates. Bruesewitz v. Wyeth LLC, 562 U.S. 223, 241-242 (2011). Tessera, "Seventy-Eight" (21 September 2026) and "Where the Answer Lives" (30 September 2026), as published at blog.tessera.pe, including for Kalshi's Ninth and Sixth Circuit rulings.

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