The outcome carries a notable twist. U.S. District Judge Michael T. Liburdi had denied Kalshi's own request for a preliminary injunction just two days earlier, citing the federal Anti-Injunction Act, which restricts courts from interfering with active state proceedings. When the CFTC sought emergency relief through a temporary restraining order, the judge granted it. That sequence makes the central issue clear: this dispute is not about whether Kalshi operates legitimately. It is about which level of government has the authority to oversee prediction markets at all.

Arizona's charges and the federal response

Arizona charged Kalshi with 20 misdemeanor counts of unlawful wagering on March 17, 2026. State prosecutors argued the platform was running an illegal gambling operation by letting users trade contracts tied to political outcomes, college sports results, and individual player performance. Kalshi holds federal designation as a Designated Contract Market, the same regulatory category as the Chicago Mercantile Exchange, granted by the CFTC in 2020. That designation came with a complex history: in October 2024, Kalshi won a landmark legal battle against the CFTC itself, which had tried to block the platform from listing political event contracts. Kalshi began offering sports-related event contracts in January 2025, and the CFTC took no enforcement action against those products until states began moving in.

The CFTC's position is that this designation places Kalshi's contracts under exclusive federal jurisdiction through the Commodity Exchange Act. On April 2, the agency filed suits against Arizona, Connecticut, and Illinois simultaneously, asserting that state gambling laws cannot reach products the federal government has already approved and actively supervises. CFTC Chair Michael Selig framed Arizona's approach in direct terms: "Arizona's decision to weaponize state criminal law against companies that comply with federal law sets a dangerous precedent." Selig added that the court's order "sends a clear message that intimidation is not an acceptable tactic to circumvent federal law." Selig has previously characterized state enforcement actions as a "power grab" against federal authority.

Neither Kalshi nor Arizona state officials responded to requests for comment at the time of publication.

Four days before the Arizona TRO, the Third Circuit Court of Appeals handed down a 2-1 ruling in a parallel case, KalshiEX LLC v. Flaherty, finding that Kalshi's sports contracts qualify as swaps under federal law and that both field preemption and conflict preemption block New Jersey from enforcing its gambling statutes against the platform. The majority warned that allowing state enforcement would produce the regulatory "patchwork" that Congress passed the Commodity Exchange Act specifically to prevent. More than 36 states filed amicus briefs in that proceeding asserting their right to regulate sports gambling, a figure that illustrates the scale of state-level resistance the CFTC is now navigating.

A fast-growing market with fragmented legal geography

The legal battles are unfolding against a backdrop of sharp volume growth. U.S. prediction markets processed $25.7 billion in contracts during March 2026, the second-largest monthly total on record after January's peak of $26.75 billion. Year-over-year volume is up roughly 13 times. Kalshi controls approximately 89 percent of the U.S. market, according to a Bank of America report; Polymarket, its main competitor, holds around 7 percent.

Legal outcomes vary sharply by jurisdiction. Tennessee granted Kalshi a preliminary injunction in February 2026 on preemption grounds. Nevada and Massachusetts sided with state authority. The Ninth, Fourth, and Sixth Circuits each have related cases pending, and a circuit split could push the question toward the Supreme Court.

What the outcome means for users outside the United States

The regulatory fight in the U.S. has direct consequences for users in markets where traditional hedging tools are inaccessible and crypto serves as a primary financial tool for millions. Kalshi is available in 143 countries and operates with identity verification tied to U.S. federal standards. Polymarket runs on blockchain infrastructure using USDC stablecoins on the Polygon network, making it technically accessible without traditional brokerage registration in many markets, though it is blocked in the UK, Germany, France, Australia, Belgium, Italy, the Netherlands, and several other jurisdictions.

For users in Nigeria, India, Kenya, Pakistan, and Bangladesh, all of which rank among the top 20 countries in Chainalysis's 2025 Global Crypto Adoption Index (India topped the index for the third consecutive year in 2025), the outcome of this jurisdictional battle determines which model of prediction market access becomes the stable global standard. South Asia processed roughly $300 billion in on-chain transaction volume between July 2024 and June 2025, an 80 percent year-over-year increase. Sub-Saharan Africa received more than $205 billion in on-chain value over the same period, with stablecoin adoption up 180 percent year-over-year.

A CFTC victory that firmly classifies prediction market contracts as derivatives rather than gambling could shape how regulators in India, Nigeria, and Kenya approach similar products. Each of those countries is currently developing or revising digital asset frameworks. India's Securities and Exchange Board and Finance Ministry are conducting active consultations on event-based financial products. Nigeria's Securities and Exchange Commission and Central Bank have been building a layered licensing framework for digital assets since 2023. Kenya has drafted a new digital asset regulatory framework expected to take shape in 2026. A clear U.S. precedent would give their regulators a ready-made template. A fragmented result, one in which the U.S. operates a licensed system while other markets default to permissionless crypto-native platforms, risks creating regulatory arbitrage that falls hardest on users in jurisdictions with limited consumer protection infrastructure.

What comes next

On March 23, 2026, Senators John Curtis (R-UT) and Adam Schiff (D-CA) introduced the Prediction Markets Are Gambling Act, which would explicitly remove sports and casino-style event contracts from CFTC jurisdiction. If passed, it would undercut the legal foundation the CFTC is currently using in court. The Arizona TRO is temporary, and the underlying criminal charges remain open. With parallel circuit cases advancing and federal legislation in play, the core question of whether prediction markets are financial instruments or gambling products will not be settled by a single court order.