Developing Eight Days Ago We Called Arkansas's Kalshi Suit the Right Kind of Fight. The Federal Government Has Now Sued to Stop It, and to Stop Arkansas From Even Investigating.

Editor's note: this is labelled commentary. TrueEdge builds odds tools that include prediction-market prices and earns affiliate commissions from licensed sportsbooks and from ProphetX. Our standing position is that states should not criminalise federally registered exchanges. On November 5 we praised the Arkansas lawsuit this piece is about. Weigh both.

On November 5 this desk wrote that Arkansas Attorney General Tim Griffin had filed "the kind of case states should be bringing" against Kalshi: civil, no felonies, a jury, an appeal. On Thursday the United States and the Commodity Futures Trading Commission sued Arkansas and Griffin in federal court in Little Rock to stop that case.

The complaint is 34 pages and we read all of it. It is United States v. Arkansas, No. 4:26-cv-01255, and the assignment stamp on page one sends it to a district judge named Miller. The signature page is dated November 10, six days after Griffin filed. The clerk stamped it November 12. The CFTC announced it on Friday and called Arkansas "the 11th state the CFTC has sued."

What the complaint says

One count, under the Supremacy Clause. The theory is the familiar one: sports and other event contracts are "swaps," Kalshi is a designated contract market, and 7 U.S.C. § 2(a)(1)(A) gives the commission "exclusive jurisdiction." The example on page nine is "whether the Cowboys will beat the Eagles by more than seven points," whose financial consequence is said to include "ticket revenue for future Cowboys games, television viewership, payouts from sportsbooks."

Three passages are new to us and worth a reader's time.

The first is arithmetic. Arkansas sued under its Deceptive Trade Practices Act, which allows civil penalties of up to $10,000 per violation. The complaint sets that beside Kalshi's fee schedule: "On most contracts, Kalshi earns between $0.07 and $2.63 in transaction fees per 100 contracts it facilitates." Penalties counted per violation, it says, "would dwarf Kalshi's income from its activities in Arkansas and could reach the hundreds of millions of dollars." Our sum, on the complaint's own numbers: at the top of that range Kalshi makes 2.63 cents on a contract. If each contract were a violation, the maximum penalty would be about 380,000 times the fee. We do not know how Arkansas means to count violations, and neither does the complaint, which says "if."

The second is a list. Paragraph 68 names the ten earlier targets: Arizona, Connecticut, Illinois, Kentucky, Minnesota, New Mexico, New York, Rhode Island, Wisconsin and Utah, with case numbers. Nine carry dates between April 2 and June 23; Utah's is October 26. The Rhode Island entry is captioned as Kalshi's case, not the government's. It then counts its wins: preliminary injunctions in Arizona, Illinois and Minnesota. That is three of ten. The complaint does not describe the other seven.

The third is the request. The government asks the court to bar Arkansas officials "from investigating CFTC-regulated entities and their affiliates and partners for violations of, or enforcing, Arkansas state law as applied to transactions listed, offered, or executed on CFTC-regulated DCMs."

The right plaintiff

Start with what the government has right, because it is a lot.

Yesterday, writing about Louisiana, we pointed to the Anti-Injunction Act, the statute with roots in 1793 that stops federal courts from halting cases already pending in state court. It is why Kalshi's race to the federal courthouse in Louisiana bought it so little. Arkansas's case has been pending in Independence County since November 4. Kalshi could ask a federal judge to stop it and run straight into that statute.

The United States does not. The Supreme Court held in Leiter Minerals v. United States in 1957 that the Act does not restrict a stay sought by the federal government. We read that case today through a summarising reader, not in full, so take the citation as a pointer. But it explains the pattern in paragraph 68. If a federal court is going to decide whether federal law displaces a state lawsuit that has already been filed, the sovereign is the party that can ask.

It is also the more honest caption. For a year this fight has been styled as a company against a state, with the regulator filing friend-of-the-court briefs. The real dispute is between two governments over who writes the rules for a product. Selig's line on Friday, that the agency will not "let state interference thwart its regulatory efforts," is a claim a state can meet head on.

So we do not think this suit is an abuse. We said a civil case was the least destructive way for a state to press its reading. A federal suit asking a federal judge to rule on preemption is the least destructive way for Washington to answer.

Asking for too much

The trouble is in the prayer for relief and in two silences.

A bar on enforcement follows from the theory. A bar on investigating does not obviously follow from anything. Arkansas's complaint, as the federal one quotes it, alleges that Kalshi "deceptively omitted and concealed" risks including "insider trading, manipulation, trading based on advance knowledge of contract outcomes." The federal complaint, at paragraph 47, acknowledges that Congress in 1978 let states enforce their "general civil or criminal antifraud" statutes, though it reads that as aimed at "actors other than federally regulated exchanges." Arkansas has pleaded a deception case. Whether deception about a product's legality is antifraud enforcement or gambling law under another name is a merits question, and a state cannot brief it if it is forbidden to look. And "affiliates and partners" is not defined. On a plain reading it would reach brokerages that route orders to an exchange. That is our reading; a judge may narrow it.

Then there is paragraph 81. The government says Arkansas law conflicts with a federal rule requiring exchanges to give "impartial access" nationwide, and cites the CFTC's interpretation ordering exchanges to "cease domestic geographic restrictions" within 30 days. That interpretation is dated November 5. Arkansas sued on November 4. An agency that announces a rule one day after a state files, then cites the rule a week later as proof that the state's case is impossible to comply with, has not found a conflict. It has built one.

The complaint is also selective about the courts. It cites the Third Circuit, which ruled for Kalshi. It quotes one sentence from the Ninth Circuit's August decision in KalshiEX v. Assad, a case Kalshi lost, as we reported when rehearing was denied. It does not mention the Sixth Circuit, or the Second Circuit panel that refused Kalshi an injunction on November 3. Advocates choose their cases. A reader should know the choosing happened.

The question it does not answer

The federal complaint quotes Arkansas's allegation that "thousands of Arkansas residents have created accounts," including "individuals between the ages of 18 and 20," and that Kalshi has "exposed consumers, including persons aged 18 through 20 who cannot lawfully engage in casino gaming in Arkansas, to monetary losses." It quotes those lines to show what Arkansas is targeting. It never says why a state should have no voice on the age at which its residents may buy a contract on a football game.

There may be a federal answer coming. Paragraph 67 says a proposed rule titled "Regulation Customer Protection and Identification" is under White House review. We do not know what is in it. If it sets a national minimum age or suitability standard for sports contracts, the CFTC's position gets much stronger, because "we regulate this and you may not" is a better argument than "nobody regulates this and you may not."

The strongest case for the government

Fifty attorneys general with $10,000-a-violation statutes can end a national exchange without winning a single case on the merits. A company that must litigate everywhere at once will settle, geofence or fold, and the legal question will be decided by exhaustion. The complaint's history is real: Congress created the CFTC in 1974 and struck the old savings clause, in one senator's words, "to assure that Federal preemption is complete." The commission has taken enforcement actions over these contracts, including the insider-trading cases the complaint lists. On that view, asking to stop investigations is not overreach. An investigation by a hostile state is itself the weapon.

That is a serious argument and it is why we think the suit should be heard. It does not carry the full request. The remedy for fifty inconsistent lawsuits is one ruling on preemption, which this case can produce. It is not an order telling a state's lawyers they may not look.

What would change our view

If the court in Little Rock grants an injunction limited to enforcement and the gambling statutes, the government asked high and got what it was owed. If the customer-protection rule emerges with an age floor, the Arkansas complaint loses its best paragraph. And if the Eighth Circuit, which as far as we know has not ruled on any of this, sides with the Sixth and Ninth, the eleven-state campaign will have added a fourth appellate loss to a question the Supreme Court has been asked to take. The response to that petition is due December 7.

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