Polymarket sues Massachusetts to prevent closure of sports events contracts in the state

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2025/09/13: Massachusetts Attorney General sues Kalshi for illegal sports wagering operations 2025/10/28: Kalshi sues New York regulators over event contracts rules 2025/09/17: Robinhood sues Massachusetts Gaming Commission in response to Kalshi lawsuit 2026/01/30: Commodity Futures Trading Commission abandons proposed sports contracts ban

The Backstory

Why Massachusetts became a flashpoint

Massachusetts has positioned itself at the center of a widening fight over whether sports-related event contracts are regulated financial instruments or illegal wagers. In recent weeks, Attorney General Andrea Joy Campbell moved aggressively against prediction markets operating without a state sports betting license, filing a lawsuit in Suffolk Superior Court that alleged Kalshi’s “yes/no” contracts on moneylines, spreads and totals functioned as unlicensed sports bets. Her office argued the platform’s age policies, disclosures and controls fell short of state standards for consumer protection and responsible gaming. The complaint sought to halt Kalshi’s sports offerings in the state while the case proceeds. The action underscored a broader view from regulators that if a product looks and behaves like a sports wager, it belongs under state gaming law regardless of how it is labeled by a federally supervised exchange. The move also followed months of stepped-up attention to youth gambling harms and unlicensed online offerings in the state.

The state’s legal theory is now reverberating across the industry. After Massachusetts targeted Kalshi, the debate quickly spilled into adjacent platforms and partners, raising questions about where the lines fall between futures trading and betting when underlying events are sports outcomes.

Robinhood, which provides access to Kalshi’s contracts, underscored those stakes when it went to court to shield its own marketplace from potential enforcement. The company told a court that trades occur on Kalshi’s infrastructure and argued Massachusetts gambling laws should not apply to Robinhood’s role. The filing framed the episode as part of a national jurisdictional clash rather than a one-off dispute.

State-by-state pushback builds

Massachusetts is not alone. Kalshi’s product has drawn scrutiny in multiple states that say sports event contracts should be treated as wagers and limited to licensed operators. In a developing pattern, regulators issue cease-and-desist letters, warn local sportsbooks that partnerships could imperil their own licenses and threaten direct enforcement when platforms do not retreat. Kalshi has answered with litigation, asserting that federal commodities law governs “event contracts” and preempts state gambling regimes.

The company sued New York’s gaming regulators after they moved to rein in sports-related markets, telling a federal court that the Commodity Futures Trading Commission has exclusive jurisdiction over its exchange and that the state’s posture improperly intrudes on federal oversight. The complaint argued New York’s actions mirror enforcement trends elsewhere and highlighted how the finance-versus-gaming divide has become a live regulatory fault line in the United States. Similar tensions surfaced earlier in New Jersey, according to industry observers, while Nevada took the opposite tack by declaring that sports event contracts are wagers for purposes of state law.

Ohio has become another test case. There, Kalshi filed a federal suit against the Casino Control Commission and the attorney general’s office, saying threatened enforcement chilled business relationships and conflicted with federal law. The complaint in Columbus sought an injunction ahead of a planned operational timeline and came on the heels of a multistate legal brief from attorneys general defending states’ authority to regulate online betting. Each new front adds to the mosaic of conflicting interpretations that platforms must navigate if they wish to offer nationwide access to sports-linked markets.

The federal pivot that raised the stakes

At the federal level, the CFTC has stepped back from a blanket prohibition on sports and political contracts. In late January, Chairman Michael Selig directed staff to withdraw a proposed 2024 rule to ban trades tied to those outcomes and to pull a 2025 advisory on sports contracts. He said the regulatory framework is outdated and that uncertainty has not served markets or the public interest, signaling the agency may engage more directly in litigation that tests the boundaries of its jurisdiction. That shift encouraged prediction markets that see CFTC supervision as the decisive authority over event-based futures, including sports.

The retreat from a categorical federal ban did not settle the matter. Instead, it heightened the conflict between states that classify sports event contracts as wagers and companies that cite federal oversight to claim preemption. With more suits filed and more injunctions sought, courts are being asked to map the line where financial hedging ends and gambling begins. The policy turn at the CFTC also emboldened platforms to expand partnerships and marketing around sports content, even as state regulators warn that licenses are required.

Platforms, partners and collateral risk

The ripple effects extend beyond the exchanges themselves. Brokerages and distribution partners face exposure if their pipes carry products states view as unlicensed sports betting. That risk prompted Robinhood’s lawsuit against the Massachusetts Gaming Commission, which asked a court to bar application of gambling laws to its facilitation of access to Kalshi’s markets. The company cast the state’s theory as an overreach that could chill innovation and blur essential distinctions between brokerage and bookmaking.

Meanwhile, prediction markets have pressed their case that they operate federally regulated financial markets, not sportsbooks. In New York, Kalshi argued that the state’s actions amount to a crackdown on lawful exchange-traded event futures, not enforcement against gambling. Its filing, prepared by Milbank, said New York’s posture threatens national operations by introducing a patchwork of state rules over a product Congress placed under federal commodities law.

The commercial stakes are rising. Kalshi and rival Polymarket recently announced a multi-year pact with the NHL for data and rights, a deal that could unlock new sports-linked volumes and fan engagement. But the same expansion exposes platforms to a wider web of state licensing, tax and responsible gaming requirements. In Nevada, for example, regulators have told licensees that sports event contracts are wagers, and exchanges would need state gambling licenses to operate there.

A fragmented map with national implications

Each new complaint compounds the uncertainty. Massachusetts’ suit against Kalshi, which focuses on consumer protections and youth access, echoes governors’ and commissioners’ broader concerns about offshore or unlicensed betting lookalikes. New York’s regulatory moves and Kalshi’s federal challenge to them test whether state gambling law can coexist with exchange-traded sports contracts. In the Midwest, Kalshi’s Ohio lawsuit targets threats that it says scare off partners far beyond the state’s borders.

The CFTC’s policy shift adds weight to the federal preemption argument, as detailed in reporting on the agency’s withdrawal of a proposed ban. Yet states show no sign of ceding ground. In Massachusetts, Campbell’s complaint against Kalshi asserts that operators offering sports outcomes to residents must meet the same licensing and responsible gaming rules that bind sportsbooks. The parallel action by Robinhood to block state enforcement highlights how fast liability can travel through distribution chains.

The outcome will shape how Americans interact with markets that turn game results into tradable exposures. A ruling that event contracts are futures could catalyze growth under a single federal regime. A determination that they are wagers would cement a state-by-state gauntlet of licenses, taxes and marketing limits. Until courts reconcile those models, platforms, partners and regulators are likely to keep testing the boundaries, one jurisdiction at a time.