Is Kalshi legal in Arizona? The criminal case that got thrown out
Arizona did what no other state had tried. Instead of a cease-and-desist or a civil suit, the attorney general filed criminal charges — a 20-count indictment against a company registered with a federal agency. Seven weeks later a federal judge shut the whole thing down, permanently. It is the most aggressive state action against a prediction market to date and the most decisive federal rebuke.
The timeline
| Date | What happened |
|---|---|
| Mar 17, 2026 | AG Kris Mayes files a 20-count indictment against KalshiEX LLC and Kalshi Trading LLC. First criminal prosecution of a CFTC-registered prediction market in US history. |
| April 2026 | The CFTC files an emergency motion. U.S. District Judge Michael Liburdi blocks the state from proceeding and bars the scheduled arraignment. |
| May 2026 | Liburdi converts the temporary order into a permanent injunction, ending the prosecution. |
| Aug 11, 2026 | Kalshi operating in Arizona. AG's office still "evaluating legal options"; no appeal filed. |
| Aug 28, 2026 | Ninth Circuit rules 3-0 against Kalshi in the Nevada case. The holding is binding precedent in Arizona and may undermine the preliminary injunction Kalshi holds against Arizona regulators. |
What Arizona actually charged
Sixteen of the twenty counts were ordinary betting and wagering offences. The other four were the interesting ones: election wagering, a separate Arizona statute. Those counts concerned contracts on the 2026 Arizona governor's race and its Republican primary, the 2026 secretary of state race, and the 2028 presidential election.
That split matters. Sports event contracts are the flashpoint in most states, but Arizona went after election markets — the product category Kalshi fought a separate multi-year battle with the CFTC to offer at all. A state criminalising election contracts specifically is a different threat from a state calling sports contracts unlicensed sportsbooks.
Why the judge stopped it
Judge Liburdi grounded the injunction in preemption. His reasoning was structural rather than about gambling policy: the Commodity Exchange Act gives the CFTC exclusive jurisdiction over designated contract markets, and Congress has consistently widened federal authority in this area rather than narrowing it. He wrote that every time Congress revisited the federal-state allocation of authority here, it chose to expand federal control.
Applied to a criminal case, that logic is close to absolute. A state cannot prosecute conduct that federal law authorises. It is a stronger form of the same argument Kalshi lost in Wisconsin four months later, which is the part worth sitting with.
The same argument, opposite results
Arizona and Wisconsin are the cleanest test of how unsettled this area is. Both cases turned on whether CFTC registration preempts state gambling enforcement. Both were decided in federal district court. They came out opposite ways within four months.
| State | Court | Outcome |
|---|---|---|
| Arizona | D. Ariz. (Liburdi) | Preemption wins. Criminal case permanently enjoined, May 2026. |
| New Jersey | 3rd Circuit | Preemption wins. Injunction against the state affirmed 2-1, April 2026. |
| Minnesota | D. Minn. | Preemption wins. Statutory ban blocked before it took effect, July 2026. |
| Wisconsin | E.D. Wis. (Griesbach) | Preemption fails. CFTC injunction denied, July 29, 2026. |
| Nevada / Michigan / Washington | State courts | Preemption fails. Geofences ordered or negotiated. |
There is no circuit split yet, but the district courts are openly divided, which is usually how one starts. Our 50-state tracker keeps the current posture for every state.
What changed since August 2026
Arizona has moved to reopen its case. By September 25, 2026 Attorney General Kris Mayes had asked the Ninth Circuit to dissolve Judge Liburdi’s injunction, arguing that the August 28 Nevada decision in KalshiEX v. Assad raised identical questions and that “Assad is now the law of this Circuit”; the CFTC conceded that Liburdi’s reasoning cannot stand but asked the court to wait until Kalshi’s petition for rehearing en banc, filed September 9, is decided (Arizona Mirror, September 25). On September 16 a second Ninth Circuit panel held that Kalshi’s sports contracts are Class III gaming on tribal land in California, a ruling with obvious relevance in a state with more than twenty tribal casinos. On October 7 Mayes signed the 39-state brief urging the Supreme Court to hear New Jersey’s appeal in Flaherty v. KalshiEX, No. 26-299, with Kalshi’s response due November 9 (brief). At the federal level the CFTC’s interim final rule excluding licensed casino and sportsbook bets from the swap definition took effect on its Federal Register publication on October 19, with comments on it and the companion event-contract proposal due November 18 (91 FR 65969). As of October 20, 2026 the injunction remains in force, no appellate ruling on it has issued, and Kalshi is available in Arizona; the status above the table is unchanged, but the shield is now under direct challenge.
What it means for Arizona users
Access is normal and unusually well protected. A permanent injunction is a stronger shield than the absence of an enforcement action, because it forecloses the state's most obvious next move. The realistic risk is a Ninth Circuit appeal, and the attorney general has not filed one.
The one caveat is scope. The injunction protects Kalshi. It does not automatically extend to every other platform operating in Arizona, and a differently postured defendant could get a different answer.
This is analysis, not legal advice.
FAQ
- Is Kalshi legal in Arizona?
- Yes. The criminal prosecution was blocked in April 2026 and permanently enjoined in May. Kalshi operates in Arizona.
- What did Arizona charge Kalshi with?
- A 20-count indictment filed March 17, 2026: sixteen counts of betting and wagering, four counts of election wagering tied to the 2026 Arizona governor and secretary of state races and the 2028 presidential race.
- Why was the prosecution blocked?
- Judge Michael Liburdi held that the Commodity Exchange Act preempts state gambling enforcement against CFTC-registered exchanges, noting Congress has repeatedly expanded rather than narrowed federal control in this area.
- Will Arizona appeal?
- Arizona has not appealed, but by late September 2026 the attorney general asked the Ninth Circuit to dissolve the injunction on the strength of the August 28 Nevada ruling; the motion is pending while Kalshi seeks rehearing en banc.
Sources
- Arizona Attorney General — Mayes charges Kalshi with illegal gambling operation, election wagering
- NBC News — Arizona files criminal charges against Kalshi
- Arizona Mirror — Arizona's criminal case against Kalshi permanently blocked by federal judge
- Morgan Lewis — Arizona files first criminal charges against a prediction market
