DOJ Sues Connecticut, Arizona & Illinois Over Prediction-Market Crackdowns — What It Signals for Florida
The federal government filed suit against three states attempting to regulate Kalshi and Polymarket. The aggressive defense changes the calculus for any future Florida action.
- Federal-vs-state battles are now being fought by the DOJ, not just by Kalshi's private legal team
- Florida is structurally less likely to act now that the cost of losing has gone up
- Trading on Kalshi or Polymarket from Florida remains exactly as legal as it was — only the political risk profile has shifted
- Watch for any DOJ filing in the Eleventh Circuit. There is no reason to expect one, but it would be the canary
What the DOJ Filed
On March 19, 2026, the U.S. Department of Justice filed parallel civil actions against Connecticut, Arizona, and Illinois, asking federal courts to block each state from enforcing its gambling laws against Kalshi and Polymarket. The complaints argue that state enforcement actions interfere with the CFTC's exclusive jurisdiction over swaps and derivatives trading on federally licensed exchanges.
This is a significant escalation. Until now, Kalshi and Polymarket had been defending themselves on a state-by-state basis with private litigation. With the DOJ stepping in, the federal government itself is now the lead plaintiff — and that changes the political and legal cost calculation for any state considering similar action.
Florida Read-Through
Florida has not joined the cease-and-desist trend that Connecticut, Arizona, Illinois, and New Jersey kicked off in 2025. The state's silence is itself a signal: with the DOJ now aggressively defending the federal preemption argument, the political downside of a Florida enforcement action just got higher. A state AG who tried it would be inviting a DOJ suit in the Eleventh Circuit.
Florida also has unusual incentives. The state collects no income tax, so there's no direct revenue grab from steering trading volume into Hard Rock Bet (the Seminole compact already monopolizes online sports betting). And Governor DeSantis, while publicly skeptical of Kalshi (see our Feb 25 coverage), has not directed any agency to take action — likely because the legal exposure is now obvious.
The Three Cases at a Glance
| State | State action being challenged | Likely outcome |
|---|---|---|
| Connecticut | Cease-and-desist against Kalshi sports contracts | DOJ likely wins on preemption |
| Arizona | Department of Gaming order to block prediction-market operations | Similar — preemption argument is strong |
| Illinois | Gaming Board enforcement letter targeting both operators | Likely consolidated with Third Circuit reasoning |
What This Means for FL Traders
- •Federal-vs-state battles are now being fought by the DOJ, not just by Kalshi's private legal team
- •Florida is structurally less likely to act now that the cost of losing has gone up
- •Trading on Kalshi or Polymarket from Florida remains exactly as legal as it was — only the political risk profile has shifted
- •Watch for any DOJ filing in the Eleventh Circuit. There is no reason to expect one, but it would be the canary
The Strategic Picture
When the federal government picks sides in a preemption fight, the side it picks usually wins. The DOJ doesn't file these cases lightly — it does extensive internal vetting and only sues when it believes the legal posture is strong. That tells you exactly how the executive branch views the underlying question. For Florida traders, the practical takeaway is simple: the federal umbrella protecting prediction-market trading just got a lot wider.
Frequently Asked Questions
Everything Florida residents need to know about legally trading sports, politics, and hurricane markets on Kalshi and Polymarket in 2026.
Related guides
Pillar pages
Sources & references
- 1.Commodity Futures Trading Commission — Event Contracts — CFTC.gov
- 2.Kalshi wins court battle to offer election contracts — Reuters
- 3.Polymarket and the rise of prediction markets — Associated Press
- 4.Kalshi & Polymarket coverage — Bloomberg
External links open in a new tab. We cite primary regulatory and major news sources where possible. Citations to trusted regulators (CFTC, SEC, IRS, NOAA, .gov, .edu) are dofollow; commercial outbound links are not endorsements.
Fifteen years in regulated gambling: that's Catie Di Stefano's track record, beginning at Betsson Group in Malta and continuing through nearly five years at Gaming Innovation Group (GiG).
She went on to run an independent consultancy across European and US iGaming brands — including a licensed engagement with Hard Rock Hotel & Casino Atlantic City under a New Jersey DGE vendor license — and spoke publicly on Florida's gaming market as early as 2022, at a Next.io panel in New York.