Nevada's tax argument against Kalshi cuts deeper than preemption

North Carolina's budget bill was meant to be a win for Kalshi. A Democratic governor signed it into law. It named the CFTC as the governing authority. It exempted federally regulated exchanges from state licensing requirements. Kalshi's legal team had every reason to treat Senate Bill 257 as validation of their core preemption argument.

Nevada's deputy attorney general, Abigail Pace, read it differently.

What Pace filed with the Ninth Circuit on Thursday is not a new legal theory. It is a judo move — using Kalshi's own embrace of North Carolina's 6% trading revenue tax to argue that Kalshi has already conceded the central point. If a state can identify Kalshi's activity attributable to its residents, measure it, and extract revenue from it, then the field preemption argument — that the Commodity Exchange Act leaves no room for state regulation of designated contract markets — is not a legal principle Kalshi actually believes. It is a position Kalshi holds only when the state in question is Nevada.

Pace's papers spell this out without subtlety. North Carolina's bill "acts directly in the very field Kalshi claims is preempted." The distinction Kalshi draws between regulating its contracts and taxing revenue from those contracts, she writes, "is purely a formalism."

She is right about that, and this is where I think the consensus read of this litigation has been too comfortable for Kalshi. The preemption doctrine does not turn on the label a state puts on its intervention. Field preemption asks whether Congress intended to occupy the regulatory space so completely that no state law can operate within it. If Kalshi accepts North Carolina's authority to require revenue attribution by state, to calculate a rate, and to collect on it — that acceptance is a statement about the scope of federal occupation. You cannot hold a field against Nevada while leasing it to North Carolina.

The Illinois situation adds another layer that has not received enough attention. That state imposed a tiered transaction tax requiring operators to obtain a sports-betting license — a licensing burden, not merely a revenue measure. Kalshi has sued to overturn it. So the company's position, taken together, appears to be that some state interventions are acceptable and some are not, with the line running somewhere between a tax it chose not to fight and a licensing regime it did. Whether that line is legally coherent is precisely what the Ninth Circuit will have to determine.

My read is that Pace's filing has narrowed Kalshi's appellate room more than the company's public posture suggests. The self-certification framework under the Commodity Exchange Act gives a designated contract market significant latitude to operate without prior regulatory approval — but it does not, by its own text, strip states of every tool. The question courts will reach is whether the CEA's silence on state revenue measures constitutes permission or preemption. Kalshi's North Carolina conduct has made that question harder to answer in its favor.

Prediction markets on the Ninth Circuit outcome exist and are active. They are, in my view, underweighting the force of Pace's estoppel-adjacent argument, which does not require the court to resolve the underlying preemption question — only to hold that Kalshi cannot argue both sides of it at once.

The legal standard that applies here is the one the Supreme Court articulated in Pacific Gas & Electric: field preemption requires a showing that federal law is "so pervasive" as to make reasonable the inference that Congress left no room for the states to supplement it. Whether a company that accepted supplementation in one state can invoke that pervasiveness against another is a question the Ninth Circuit has not yet answered.