Baltimore sues election betting platforms Kalshi, Polymarket

The City of Baltimore filed a lawsuit this week against prediction market platforms Kalshi and Polymarket, arguing that the products they offer inside the city amount to unlicensed sports betting. City officials said the platforms’ event-based contracts allow the companies to operate outside state requirements that apply to traditional sportsbooks.

According to the complaint, Baltimore is challenging the substance of the products rather than the labels used to describe them. Officials argued that while the platforms present contracts as outcome-based instruments, the way they are marketed and used by customers resembles wagering and should therefore fall under the same state licensing framework applied to sportsbook operators.

Baltimore’s classification argument centers on event contracts The

Baltimore’s classification argument centers on event contracts

The City A central issue in the case is how the contracts should be classified. Baltimore contends that event-based prediction contracts function like bets on sports outcomes even when they are structured as “yes/no” markets or similar formats. The lawsuit says the design of the contracts and their practical use enable prediction markets to compete with licensed sportsbook operators without complying with state licensing obligations. In support of that comparison, the city cited established operators such as DraftKings and FanDuel as examples of companies that operate under state-level licensing regimes. Officials cite licensing gaps on oversight, taxes, and safeguards City officials said the dispute is not only about market competition. The complaint asserts that, unlike licensed sportsbooks, prediction market platforms can avoid state-mandated guardrails focused on consumer protection and harm reduction. Baltimore also pointed to state-linked tax structures that Baltimore also pointed to state-linked tax structures that apply to licensed sportsbook activity. In the city’s telling, the platforms’ ability to offer wagering-like products without entering the same oversight and tax framework amounts to regulatory arbitrage. The filing also argues that the platforms may be subject to federal oversight while still operating, in practical terms, like retail sportsbooks within Baltimore’s jurisdiction. The city’s complaint frames this as a mismatch between how the products are regulated and how they function for consumers.

Potential ripple effects if local enforcement spreads

The City The case raises the possibility of operational disruption for prediction market companies if local and state authorities adopt similar approaches. Baltimore’s filing signals that municipal governments may attempt to apply existing gambling statutes to products they view as sports wagering in all but name.

The city argues that, if its position is upheld, the outcome could force changes in how event-based prediction markets are offered across the United States. The lawsuit outlines a scenario in which platforms might need to revise product design, access, or compliance methods to align with state gambling rules.

Legal uncertainty remains until courts draw clearer lines

Baltimore’s lawsuit highlights what it describes as an unsettled legal landscape for event-based prediction contracts. Officials indicated the dispute is likely to continue until federal courts, or potentially the Supreme Court, provide clearer direction on whether these contracts should be treated as regulated sports betting.

Until a definitive ruling is reached, the legal status of such offerings may remain contested across jurisdictions. The complaint frames the broader question as where prediction markets end and regulated wagering begins.