Minnesota just became the first state to explicitly ban prediction markets, and the real fight is only beginning.

Gov. Tim Walz signed a public safety bill last week that outlaws platforms like Kalshi and Polymarket from operating in the state. The law targets event-contract markets where users can bet on anything from election outcomes to Federal Reserve policy decisions. Minnesota’s attorney general can now enforce civil penalties against platforms that let residents trade on these contracts.

The timing matters. Prediction markets have been in legal limbo for years, with the Commodity Futures Trading Commission claiming authority over them as derivatives while never quite settling whether they’re legal gambling, illegal betting, or something else entirely. Kalshi won a federal court case last year that let it offer election contracts, arguing the CFTC overstepped its authority. Polymarket operates offshore but serves U.S. users through various workarounds.

Now Minnesota is saying: we don’t care what the feds decide, these platforms are banned here.

The federalism problem

The core legal question is preemption. Federal law governing commodity futures and derivatives might already occupy the field, leaving no room for state regulation. The Commodity Exchange Act gives the CFTC exclusive jurisdiction over most derivatives markets. If prediction markets fall under that umbrella, state bans might be invalid from the start.

Prediction market operators will almost certainly argue exactly that. Kalshi and Polymarket both structure their products as derivative contracts, not gambling. They’ve built their entire regulatory strategy around the idea that only federal regulators can touch them. A state ban threatens that framework.

Minnesota likely sees it differently. States have broad authority to regulate gambling within their borders. If prediction markets are really just sports betting with a financial veneer, states can ban them the same way they ban online poker or daily fantasy sports. The state doesn’t need to wait for the CFTC to decide.

Both sides have real arguments. The CFTC regulates derivatives but has never clearly approved prediction markets. States regulate gambling but have never dealt with derivatives that look like betting. The legal ambiguity cuts both ways.

What this means for platforms

Kalshi and Polymarket now face a choice. They can comply with Minnesota’s ban and accept that states have veto power over their business model. Or they can sue, arguing federal law preempts state gambling restrictions.

Expect lawsuits. Kalshi didn’t fight the CFTC in federal court just to roll over for state bans. The company has venture backing and a regulatory strategy built on federal approval. A state-by-state approach kills that model. If Minnesota can ban prediction markets, so can California, New York, and Texas. The platforms need a win here.

The legal fight will probably focus on whether prediction markets are more like commodities or more like gambling. If they’re commodities, federal law preempts state bans. If they’re gambling, states can regulate or prohibit them. The answer isn’t obvious. Event contracts derive their value from real-world outcomes, which sounds like derivatives. But users are betting on those outcomes, which sounds like gambling.

Courts will also look at what Congress intended when it gave the CFTC authority over derivatives. Did Congress mean to block states from regulating prediction markets? Probably not, since prediction markets barely existed when the law passed. But did Congress mean to let the CFTC regulate all derivative contracts, regardless of what states think? Maybe.

Who this affects

For now, the ban only hits Minnesota residents. Platforms can block Minnesota IP addresses and move on. But other states are watching. If Minnesota’s ban survives a legal challenge, expect similar bills in states that restrict online gambling. If the ban gets struck down on preemption grounds, prediction markets get a clearer path forward.

The outcome also matters for the CFTC. The agency has been trying to figure out its stance on prediction markets for years. A state ban forces the question. Either the CFTC asserts exclusive authority and tells states to back off, or it lets states regulate and accepts a fragmented market. The agency can’t avoid the issue anymore.

Prediction market users should pay attention too. Right now you can trade on Kalshi or Polymarket from most U.S. states, assuming you’re willing to navigate the platforms’ geographic restrictions. If states start banning these markets, access gets harder. VPNs and offshore accounts become necessary. The markets don’t disappear, they just get pushed into a grayer legal zone.

What happens next

The first move belongs to the platforms. If Kalshi or Polymarket files suit in federal court arguing preemption, we’ll get an answer within months. If they don’t sue, Minnesota’s ban stands and other states will likely follow.

Either way, this is the beginning of a real legal fight over whether prediction markets can exist in the U.S. at all. The federal government has been ambiguous. Now states are forcing the issue. Someone is going to have to decide what these platforms actually are, and whether states or federal regulators get to control them.

Minnesota just made sure that decision can’t be delayed much longer.