Wisconsin Just Called Your Polymarket Trades Illegal Gambling — And Coinbase Is in the Dock Too
Five states. Two federal lawsuits from the CFTC. One restraining order against Arizona. And now Wisconsin.
The war over prediction markets just got a major new front — and this time, Coinbase, Robinhood, Polymarket, Kalshi, and Crypto.com are all named defendants in the same state-level offensive filed on April 23, 2026.
What Happened
Wisconsin Attorney General Josh Kaul filed two separate lawsuits against the biggest names in the prediction market space, arguing their platforms are nothing more than unlicensed gambling operations operating illegally in the state.
Lawsuit #1: Kalshi, Coinbase, and Robinhood
Lawsuit #2: Polymarket and Crypto.com
Both suits center on the same legal theory: when users pay money to take a position on a real-world outcome — a sports game, an election, a Fed rate decision — and receive a fixed payout if they’re right, that’s a bet. And Wisconsin says you need a gambling license to run a betting operation in the state.
Wisconsin’s prosecutors didn’t have to look hard for evidence. They leaned on the platforms’ own marketing copy.
Kalshi’s Instagram ads described the platform as “The First Nationwide Legal Sports Betting Platform.” Polymarket called itself “a platform where people can bet on the outcome of future events.”
In a courtroom, it’s hard to argue you’re not running a sportsbook when your Instagram says you are.
The Other Side
Kalshi’s defense is straightforward: these are swaps listed on a CFTC-regulated designated contract market. Federal law preempts state gambling statutes. Full stop.
That argument got a significant boost earlier this month when the Third Circuit sided with Kalshi, treating the CFTC’s decision not to block the contracts as effectively settling the jurisdictional question in the company’s favor.
Coinbase CLO Paul Grewal was direct in his response to the Wisconsin suits: Congress designed derivatives markets to have uniform federal oversight. Letting each state carve out its own rules doesn’t just create a patchwork — it kills the market entirely.
The CFTC Has Entered the Chat
The federal regulator hasn’t been sitting on the sidelines. The CFTC has already filed suits against Arizona, Connecticut, and Illinois, seeking injunctions to stop state enforcement against its registered exchanges. Earlier this month, a U.S. District Court in Arizona granted the CFTC a temporary restraining order, barring the state from pursuing criminal charges against CFTC-regulated platforms.
The CFTC also issued an Advanced Notice of Proposed Rulemaking (ANPRM) on March 12, 2026, seeking to clarify the regulatory framework for prediction markets. Public comments are due April 30.
In other words: the federal government is actively protecting these platforms while states are actively suing them. The same companies are simultaneously winning in federal court and getting dragged into state court.
Why This Is Headed to SCOTUS
New York AG Letitia James has already weighed in: “Each contract is a bet.”
That framing is the heart of the conflict. If it’s a financial instrument — a swap, a futures contract — it’s a CFTC matter. If it’s a wager on a sporting event, it’s state gambling law. The two legal frameworks are mutually exclusive, and courts across the country are splitting the difference in different directions.
The Supreme Court is the only body that can resolve a circuit split of this magnitude. Legal analysts across the industry agree: this case is going to One First Street.
The Numbers at Stake
Prediction markets have exploded in the wake of their accuracy during the 2024 election cycle. Polymarket alone processed over $3.7 billion in volume last year. Kalshi’s partnership distribution with Robinhood and Coinbase has pushed event contracts into the hands of retail investors who never would have found the platforms on their own.
If the states win, those users lose access. If the federal government wins, prediction markets become a permanent fixture of American financial infrastructure.
Why This Matters for Crypto Jobs
Regulatory battles of this scale don’t just create legal precedent — they create entire new job categories.
Compliance Officers who understand both CFTC derivatives rules and state gambling law are already commanding premium salaries across prediction market platforms. Kalshi, Polymarket, and their distribution partners are actively building legal and regulatory affairs teams to handle exactly this kind of multi-jurisdictional fight.
Policy Analysts and Government Affairs roles at crypto-adjacent firms are surging. Every new state lawsuit means another filing, another response, another lobbying effort at the state legislature to preemptively pass clarifying legislation.
Smart Contract Auditors and Legal Engineers who understand how on-chain prediction markets work will be critical as these platforms adapt their technical architecture to comply with — or route around — state-level restrictions.
If you’re building a career in crypto compliance, regulatory affairs, or crypto-adjacent legal work, the prediction markets battle is the single most important regulatory fight to be following right now. The outcome will define whether Web3 financial instruments can exist in America — or whether they’ll be Balkanized into a 50-state compliance nightmare.
Looking for your next role in crypto compliance, legal, or policy? Browse open positions at cryptogrind.com — the job board built for crypto builders, researchers, and regulators who want to work at the frontier.
