Kalshi & Polymarket’s fate hangs on CFTC’s 10-state war

Chair Michael Selig says Washington alone should police event contracts traded on registered exchanges.

The hit

The Commodity Futures Trading Commission is suing at least 10 states, including Arizona, Connecticut, Illinois & Utah, over who gets to regulate prediction markets. CFTC Chair Michael Selig said the agency is ready to take the fight to the Supreme Court. The dispute centres on whether federal law gives Washington exclusive control over event contracts traded on registered exchanges.

Why it matters

A Supreme Court showdown would settle whether platforms like Kalshi, Polymarket & Crypto.com/Nadex operate under one federal rulebook or face a patchwork of state restrictions. A growing list of states treat these contracts as gambling. For the platforms, according to the source, the stakes are existential.

The record

States sued	At least 10, including Arizona, Connecticut, Illinois & Utah (CFTC)
First lawsuits filed	April 2026
Selig’s Supreme Court remark	30 October 2026
Preliminary injunctions won	Arizona & Illinois (initial rulings favour CFTC)
Amicus briefs filed	4 federal appeals courts & 1 state supreme court (as of late October 2026)

What happens next

Watch rulings in the 10 federal cases & the appeals courts where the CFTC has filed amicus briefs, plus whether the disputes produce a circuit split.

Sources: CFTC Chair Selig vows to take state fight over prediction markets to the Supreme Court

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