Kalshi, a leading U.S. regulated prediction market platform, has filed a lawsuit in federal court against the Governor and Attorney General of Illinois. The company is taking immediate action to challenge Illinois' new budget bill (SB3019), set to take effect on July 1st, which would mandate that prediction market platforms obtain state-level licenses and impose a 0.2% transaction tax.

The core of Kalshi's argument is that the bill infringes upon the exclusive jurisdiction of the federal Commodity Futures Trading Commission (CFTC). Under the Commodity Exchange Act (CEA), prediction market event contracts are classified as 'swaps' subject to federal regulation. Consequently, Kalshi argues that the state imposing its own regulatory barriers or taxes is unconstitutional under the principle of federal preemption.

This lawsuit is bolstered by the legal precedent set by the Third Circuit Court of Appeals last April, when Kalshi successfully sued New Jersey regulators. At that time, the court explicitly recognized that prediction market contracts fall under the federal domain governed by the CFTC. If Illinois' attempt is permitted, prediction market platforms would face the risk of fragmentation, forced to navigate a patchwork of state-specific regulations and taxes.

The Web3 and DeFi sectors are closely watching the outcome of this case. Although Kalshi is a Web2-based platform, if state-level regulation is permitted, on-chain prediction market protocols like Polymarket could face similar pressures for alleged violations of state laws when providing services to U.S. users. It is essential to continue monitoring how this jurisdictional tug-of-war between federal and state governments will affect liquidity in the prediction market ecosystem.