Meta description: State lawsuits against Kalshi are testing whether sports prediction markets are federally regulated derivatives or state-regulated gambling.

Tags: Kalshi, Polymarket, CFTC, Letitia James, sports betting, prediction markets

Market platform: none-if-cross-platform

Category: Regulation

State gambling challenges against sports prediction markets have moved from cease-and-desist letters into active court fights, with New York, Washington and Utah all testing Kalshi’s core legal theory: that CFTC-regulated event contracts are federally supervised derivatives, not sports bets subject to state licensing. The next industry milestone is the CFTC’s pending rulemaking on event contracts involving gaming and other statutorily sensitive categories.

The dispute is no longer limited to whether prediction markets can list election or sports contracts. It now turns on who gets to police the product when a federally registered exchange offers contracts that look, to state regulators, like sports wagering. The answer will shape Kalshi, Polymarket US, Coinbase’s prediction-market plans, Gemini’s prediction-market plans and any sportsbook incumbent trying to enter event contracts without becoming trapped in 50 state gambling regimes.

What is the legal fight over sports prediction markets?

The central fight is preemption. Kalshi argues that its contracts trade on a CFTC-regulated derivatives exchange and are governed by the Commodity Exchange Act. State gambling regulators and attorneys general argue that sports-event contracts still can violate state gambling laws when offered to residents without a state sports-wagering license.

The CFTC has taken a broad view of its own authority. In CFTC Press Release No. 9194-26, issued March 12, 2026, the agency opened an advance notice of proposed rulemaking on prediction markets and said it was seeking public comment on event contracts, statutory core principles, public-interest limits and cost-benefit issues. The Federal Register notice, 91 FR 12516, gave commenters until April 30, 2026.

The agency followed with CFTC Press Release No. 9249-26 on June 10, 2026, announcing a notice of proposed rulemaking on amendments to Regulation 40.11 and a proposed Appendix F to part 40. The proposal focuses on contracts involving activities listed in Commodity Exchange Act Section 5c(c)(5)(C), including terrorism, assassination, war, gaming and conduct unlawful under federal or state law.

That structure matters because sports contracts sit close to the word “gaming,” while the platforms say they are offering exchange-traded event derivatives. The CFTC’s June release said the proposal would create a framework for deciding when a contract involves one of those enumerated activities and, if so, whether the contract is contrary to the public interest.

Which states are challenging Kalshi?

New York Attorney General Letitia James sued Kalshi on July 31, 2026, alleging that the company operates an illegal, unlicensed gambling business in the state. Reuters reported that the petition was filed in a Manhattan state court and said Kalshi had not obtained a New York State Gaming Commission license for a platform where users trade on outcomes including sports and elections. The Times Union reported the lawsuit seeks $36 billion in damages and penalties.

The New York case followed a federal ruling against Kalshi in a related preemption fight. In KalshiEX LLC v. Williams, No. 1:25-cv-08846, U.S. District Judge Analisa Torres denied Kalshi’s request for a temporary restraining order and preliminary injunction against New York State Gaming Commission officials. A July 13, 2026 amended opinion corrected a citation error but left the denial in place.

Washington also won an early ruling. Reuters reported that King County Superior Court Judge John McHale granted Washington’s request for a preliminary injunction on July 20, 2026, blocking Kalshi from offering event contracts in the state. The order found that Washington had shown a likelihood of injury to consumers from illegal gambling activity and rejected Kalshi’s argument that the Commodity Exchange Act preempted state gambling law.

Utah secured a similar result in federal court. The Associated Press reported on August 6, 2026, that U.S. District Judge Robert Shelby ruled Utah could enforce its anti-gambling laws against prediction markets such as Kalshi and Polymarket. Kalshi had sued Utah in February 2026 to block enforcement, and the AP reported that the company planned to appeal.

What role are state attorneys general playing?

State attorneys general are trying to preserve state authority over sports betting and gambling enforcement before the CFTC finalizes a federal framework. The Block reported that 44 state attorneys general submitted a July 2026 comment letter to the CFTC arguing that the agency lacks authority to regulate sports-related prediction markets in the way contemplated by its proposed rule.

New York was already aligned with that position before its Kalshi suit. In an April 24, 2026 press release, Attorney General James said she joined 37 other attorneys general in an amicus brief supporting Massachusetts’ lawsuit against Kalshi. The New York attorney general’s office described Kalshi’s sports event contracts as illegal gambling and argued that state gambling laws should apply.

That April release also supplied two numbers that explain why state officials are focused on sports. The New York attorney general’s office said Kalshi reported more than $1 billion in monthly user betting activity in 2025 and said 90 percent was spent on sports betting. Those characterizations came from an adversarial state filing, not from a neutral market-data release, but they show how states are framing the product in court.

Where does Polymarket fit into the regulatory map?

Polymarket’s U.S. posture changed after its 2025 QCEX transaction. In a July 21, 2025 company announcement distributed through PR Newswire, Polymarket said it acquired the holding company of QCX LLC and QC Clearing LLC, described as a CFTC-licensed derivatives exchange and clearinghouse, for $112 million. The company said the deal was intended to support a regulated U.S. re-entry.

CFTC filings confirm the regulatory status of the U.S. entity. A CFTC designated contract market filing dated July 9, 2025 lists “QCX LLC d/b/a Polymarket US” as designated and says QCX LLC is operating under the assumed name Polymarket US. A later CFTC rule filing, dated May 19, 2026 and certified June 3, 2026, references “Polymarket US Rulebook Fractional Contracts.”

That does not resolve the state-law fight. It means Polymarket US, like Kalshi, can point to CFTC registration for its U.S. exchange structure. State regulators can still argue that particular sports-related products trigger gambling-law restrictions when offered in their jurisdictions. The litigation against Kalshi is therefore a proxy battle for the wider sector, not just a single-company dispute.

Why does the CFTC rulemaking matter now?

The CFTC’s June 2026 proposal is the main federal process that could define how the agency reviews event contracts tied to gaming and other sensitive subjects. The proposal does not by itself end the state cases. It does, however, put the agency’s interpretation of Section 5c(c)(5)(C) into a formal rulemaking record, with comments from exchanges, sports leagues, state officials and other market participants.

Chairman Michael S. Selig framed the June proposal as a way to protect market integrity while allowing legitimate markets to proceed. In CFTC Press Release No. 9249-26, Selig said the proposal would give the commission a transparent framework to identify contracts Congress directed it to scrutinize. That is the federal side of the argument states are now challenging in court and in comment letters.

The stakes are practical. If courts continue allowing state gambling laws to apply to CFTC-regulated sports contracts, exchanges may need state-by-state restrictions even when their products clear through federally supervised infrastructure. If the CFTC and federal courts endorse broader preemption, sports prediction markets could operate more like national derivatives products, subject mainly to federal review and exchange rules.

The next concrete milestone is the CFTC’s rulemaking record for Regulation 40.11 and proposed Appendix F. That docket, together with the New York, Washington and Utah proceedings, will determine whether sports prediction markets scale under a federal derivatives model or face the same fragmented map that governs licensed sports betting after Murphy v. NCAA, the 2018 Supreme Court decision that invalidated the federal ban on state-authorized sports wagering.