Kalshi New Jersey: The Case Headed to the Supreme Court

Kalshi New Jersey is not one story among many — it is the origin story. Every other state page in this series cites the Third Circuit ruling from April 2026; this is the state that produced it. New Jersey sent Kalshi a cease-and-desist letter, lost in federal district court, lost again on appeal, and is now asking the Supreme Court to reverse both losses. That makes New Jersey the single best place to actually read the argument, not just its outcome.

Legal status in New Jersey

New Jersey has run licensed, taxed online sports betting since 2018 — it is the state whose lawsuit got PASPA struck down at the Supreme Court in the first place, regulated today by the New Jersey Division of Gaming Enforcement (DGE) under the Casino Control Act. That history is why New Jersey moved fast against Kalshi: in March 2025, DGE director Mary Jo Flaherty sent Kalshi a cease-and-desist letter arguing its sports event contracts were unlicensed wagering under the state Sports Wagering Act, and citing concerns about wagers on New Jersey collegiate teams and access by users under 21. Kalshi sued Flaherty in federal court that same month, seeking a declaration that the Commodity Exchange Act preempts state gambling law as applied to its CFTC-regulated contracts. A federal district judge granted Kalshi a preliminary injunction in April 2025, blocking New Jersey from enforcing the cease-and-desist while the case proceeded. New Jersey appealed, and on April 6, 2026, a divided Third Circuit panel affirmed the injunction 2-1, holding that Kalshi is likely to prevail on both of its core arguments: that sports event contracts are federally regulated swaps, and that the CEA preempts New Jersey's gambling statute as applied to them. It was the first ruling by any federal appeals court on the question. New Jersey did not stop there — Solicitor General Jeremy Feigenbaum requested, and received, an extension from Justice Alito to file a petition for certiorari, with a deadline of August 4, 2026, and the state has since filed that petition, positioning Flaherty v. KalshiEX as a candidate for the first prediction-markets case the Supreme Court agrees to hear. As of this writing, Kalshi is operating in New Jersey under the injunction, the Third Circuit ruling is not final law nationwide, and the Supreme Court has not said whether it will take the case at all.

State gambling authority: New Jersey Division of Gaming Enforcement (sportsbooks and casinos; the agency that sued Kalshi and lost twice)

Every Kalshi state page on this site eventually cites "the Third Circuit ruling from April 2026." This is the page about the case that produced it — and about the sequel New Jersey is now trying to force into existence at the Supreme Court.

March 2025: The Letter

New Jersey didn't wait around. The Division of Gaming Enforcement, under director Mary Jo Flaherty, sent Kalshi a cease-and-desist letter arguing its sports event contracts were unlicensed wagering under the state's Sports Wagering Act — the same law that governs FanDuel and DraftKings' New Jersey books. The letter raised two specific concerns: contracts tied to New Jersey collegiate teams, and the possibility of users under 21 trading them. Kalshi didn't comply and didn't wait for an enforcement action either — it sued Flaherty in federal court that same month.

April 2025 to April 2026: Two Losses for New Jersey

A federal district judge granted Kalshi a preliminary injunction in April 2025, keeping the state from enforcing its letter while the underlying case played out. New Jersey appealed. Thirteen months later, a divided Third Circuit panel — Judge David Porter writing, Chief Judge Michael Chagares joining, one judge dissenting — affirmed that injunction on April 6, 2026. The holding: sports event contracts are likely swaps under the Commodity Exchange Act, and federal law likely preempts New Jersey's gambling statute as applied to them. It was the first time any federal appeals court had ruled on the question at all.

"Likely to prevail" is a preliminary-injunction standard, not a final verdict. The Third Circuit ruled Kalshi is probably right, not that the case is over. New Jersey's underlying Sports Wagering Act claim against Kalshi hasn't been dismissed — it's paused behind an injunction the state is actively trying to get lifted.

Is Kalshi Legit in New Jersey?

New Jersey never argued Kalshi doesn't pay out or fails KYC checks — that fight is about licensing, not solvency. The state's actual objection is that a New Jersey resident trading a sports event contract should go through the same DGE-regulated, tax-paying pipeline as a licensed sportsbook bet. Two federal courts have now told New Jersey that federal law says otherwise, at least provisionally.

Summer 2026: New Jersey Goes Up, Not Away

Losing at the Third Circuit didn't end it. Solicitor General Jeremy Feigenbaum asked the Supreme Court for an extension to file a petition for certiorari, got one from Justice Alito running to August 4, 2026, and filed. If the Court grants review, Flaherty v. KalshiEX would be the first prediction-markets case to reach the justices — and its outcome would reach a lot further than New Jersey. Whether the Court takes it now, with only one circuit having ruled, or waits for the Sixth Circuit's pending Ohio-Tennessee split to sharpen the question, is genuinely unknown as of this writing.

Who Should Actually Read This Page

New Jersey residents deciding whether to open a Kalshi account, and anyone trying to understand why a "Kalshi is legal" claim on any other state page traces back to one lawsuit out of Trenton. It is not a page for sports betting one-click convenience — a licensed New Jersey sportsbook still exists as the state-sanctioned alternative, and Kalshi contracts can expire worthless regardless of who wins on appeal.

Kalshi New Jersey — Frequently Asked Questions

Is Kalshi legal in New Jersey right now?

Kalshi is operating in New Jersey under a federal preliminary injunction that blocks the state from enforcing its cease-and-desist order. The Third Circuit affirmed that injunction in April 2026, ruling Kalshi is likely to win on the merits. "Likely to win" is not the same as a final judgment — New Jersey has petitioned the Supreme Court to reverse it, so the legal status is federally protected for now, not permanently settled.

Why did New Jersey go after Kalshi specifically?

New Jersey has more to lose than most states: it runs one of the country's largest licensed online sports betting markets, taxed and regulated by the Division of Gaming Enforcement, and it was the state whose 2018 Supreme Court win (Murphy v. NCAA) legalized sports betting nationwide in the first place. DGE director Mary Jo Flaherty's March 2025 cease-and-desist letter argued Kalshi's sports contracts were the same product New Jersey's own licensed operators pay to offer, just without a license, a tax, or the state's underage-access safeguards.

What happens if the Supreme Court takes the case?

If the justices grant certiorari, Flaherty v. KalshiEX would become the first prediction-markets case the Supreme Court has agreed to hear, and its ruling would likely settle the preemption question nationwide — not just for New Jersey, but for every state page in this series currently sitting on a 'gray' or 'restricted' classification because a lower court hasn't ruled yet. Legal analysts following the docket have suggested the Court may decline to hear it immediately, since only one circuit has ruled so far; a genuine circuit split (Ohio and Tennessee's Sixth Circuit case is pending) could make the Court more likely to step in later.

Is Kalshi legit in New Jersey?

As a company, yes: CFTC designation since 2020, KYC-verified accounts, and a track record of settling contracts in dollars. New Jersey's regulator disputes something narrower and specific — not whether Kalshi pays out, but whether its sports contracts should have to go through the same licensing and tax regime as FanDuel or DraftKings. Two federal courts have sided with Kalshi on that question so far; the state disagrees and is still fighting it.

Is Kalshi safe to use in New Jersey?

Trading is possible today, backed by an actual federal injunction rather than just an absence of enforcement — a stronger position than states where Kalshi operates simply because no one has sued yet. Safe still means CFTC oversight and KYC, not investment-safe: a sports event contract can expire worthless no matter which court is winning at the moment. And the legal question genuinely isn't closed — a Supreme Court reversal, however unlikely in the near term, would change the answer.

Does New Jersey's licensed sports betting industry compete with Kalshi?

Directly. New Jersey's DGE-licensed sportsbooks pay state taxes and fund responsible-gambling programs that a CFTC-regulated exchange does not. That competitive and revenue argument sits underneath the legal one — it is a large part of why the state escalated to the Supreme Court rather than accepting a single circuit-court loss.

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