September 2 2026.
A growing legal battle over whether online sports “prediction markets” are financial products or gambling is moving toward a potentially consequential showdown over state regulatory authority, Tribal gaming interests and the division of jurisdiction between state governments and the federal government.
Michigan has secured a second court order blocking KalshiEx LLC from offering online sports wagers to Michigan residents, while Nevada has scored its own major victory after a federal appeals court ruled that the state can enforce its gaming laws against Kalshi's sports-event contracts.
The disputes are part of a much larger national fight involving nearly 40 state attorneys general and multiple Tribal Nations that say federally regulated prediction markets should not be able to use federal commodities law to circumvent state gaming laws and established gaming regulatory systems.
The issue is particularly significant for Tribal Nations because gaming is not simply another commercial industry. Under federal law, federally recognized Tribal Nations possess sovereign governmental authority, and Class III gaming is generally conducted within the framework established by the Indian Gaming Regulatory Act, Tribal law and, where applicable, Tribal-state compacts.
Michigan case reaches Tribal gaming territory.
Michigan's lawsuit alleges that Kalshi's sports contracts constitute sports betting under Michigan's Lawful Sports Betting Act and that the company is operating without approval from the Michigan Gaming Control Board.
The Michigan Gaming Control Board regulates commercial gaming and online sports betting while also auditing compliance with Tribal gaming compact agreements. Michigan is home to 12 federally recognized sovereign Tribal Nations that maintain government-to-government relationships with the state.
Michigan's Tribal Nations include the Bay Mills Indian Community, Grand Traverse Band of Ottawa and Chippewa Indians, Hannahville Indian Community, Keweenaw Bay Indian Community, Lac Vieux Desert Band of Lake Superior Chippewa Indians, Little River Band of Ottawa Indians, Little Traverse Bay Bands of Odawa Indians, Match-E-Be-Nash-She-Wish Band of Pottawatomi Indians, Nottawaseppi Huron Band of the Potawatomi, Saginaw Chippewa Indian Tribe, Sault Ste. Marie Tribe of Chippewa Indians and Pokagon Band of Potawatomi Indians.
The Michigan dispute therefore raises questions beyond whether a particular online product is classified as a wager.
It also raises the broader question of who gets to decide what constitutes regulated gaming when an activity crosses state lines and potentially affects established Tribal-state gaming arrangements.
Michigan's position is that Kalshi's operation deprives the state of the regulatory oversight and consumer protections required under state law. Kalshi, meanwhile, has maintained that its contracts fall under federal commodities regulation.
A Michigan court has now ordered Kalshi to maintain geofencing preventing access to the prohibited sports contracts from Michigan. Violating the preliminary injunction could result in a $500,000-per-day penalty.
Nevada provides an important test case.
Nevada has become one of the most closely watched jurisdictions in the dispute because gaming is deeply embedded in the state's regulatory structure and economy.
On August 28, the U.S. Court of Appeals for the Ninth Circuit ruled unanimously that Nevada's gaming laws can apply to sports-event contracts offered by Kalshi, rejecting the company's argument that federal commodities law prevents Nevada from regulating the activity.
The decision followed an extensive series of actions by the Nevada Gaming Control Board.
Nevada first issued Kalshi a cease-and-desist order in March 2025, stating that offering event contracts based on sporting events and elections constituted unlawful gaming unless approved under Nevada's gaming regulatory system. Subsequent litigation produced conflicting court orders, and Nevada eventually obtained state-court injunctions restricting Kalshi's prohibited event contracts.
In July 2026, Kalshi agreed to stop its sports prediction-market operation in Nevada following enforcement action by the Gaming Control Board.
The Ninth Circuit's August ruling strengthened Nevada's position.
The court essentially rejected the idea that calling a sports wager an “event contract” automatically transforms it into a financial product outside state gaming jurisdiction. That ruling contrasts with a decision from the Third Circuit involving New Jersey, creating a significant split over the respective authority of federal and state regulators.
Why Nevada's Tribal Nations are watching.
Nevada has 20 federally recognized Tribal Nations with land in the state and 28 Tribal Nations, Bands, Communities and Colonies when constituent communities are included.
Tribal-state gaming agreements already exist with numerous Nevada Tribal Nations, including the Pyramid Lake Paiute Tribe, Fort Mojave Indian Tribe, Las Vegas Paiute Tribe, Moapa Band of Paiutes, Walker River Paiute Tribe, Washoe Tribe of Nevada and California, Yerington Paiute Tribe, Reno-Sparks Indian Colony, Shoshone-Paiute Tribes of the Duck Valley Reservation and the Te-Moak Tribe of Western Shoshone Indians, among others.
The Nevada litigation consequently provides an important example of how the prediction-market debate intersects with established Tribal and state gaming systems.
The question is not whether Tribal Nations necessarily take one uniform position on every prediction-market issue. Rather, the legal conflict demonstrates why the boundary between financial markets and gaming matters to sovereign Tribal governments whose gaming operations are governed by a combination of federal law, Tribal law and negotiated agreements with states.
The issue extends far beyond Michigan and Nevada.
Michigan and Nevada are not acting alone.
In June, California joined a bipartisan coalition of 37 attorneys general supporting Ohio's effort to enforce state gambling laws against Kalshi. The coalition included attorneys general from Alabama, Alaska, Arizona, Arkansas, California, Colorado, Delaware, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Nebraska, New Jersey, New Mexico, New York, North Carolina, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Vermont, Virginia, Washington, Wisconsin and Wyoming.
Many of those states have federally recognized Tribal Nations and established Tribal gaming systems.
California alone has 64 Tribal Nations operating 67 casinos, with Tribal-state compacts or federal procedures governing Class III gaming.
Arizona provides another example. Its Tribal-state gaming system encompasses all 22 federally recognized Arizona Tribal Nations. Sixteen operate 26 Class III casinos, while other Tribal Nations possess gaming rights that can be transferred under the state's compact system.
Arizona has separately brought criminal charges against Kalshi, alleging that the company was operating an illegal gambling business and accepting wagers on sporting and election events without the required state authorization.
These disputes illustrate why the prediction-market controversy can have implications for Tribal governments even when a particular lawsuit is brought by a state.
California Tribal Nations have already entered the courtroom.
Tribal interest is not theoretical.
Three California Tribal Nations — Blue Lake Rancheria, Chicken Ranch Rancheria of Me-Wuk Indians and Picayune Rancheria of the Chukchansi Indians — filed a federal lawsuit involving Kalshi and Robinhood, alleging that sports event contracts were being offered and advertised on their Tribal lands.
The case raised questions under the Indian Gaming Regulatory Act, the federal law governing Tribal gaming, as well as other federal laws. A federal district court denied the Tribes' request for a preliminary injunction in November 2025, meaning the litigation did not end there.
In Wisconsin, the Ho-Chunk Nation likewise brought litigation concerning Kalshi's sports contracts and the Nation's authority over gaming on its Tribal lands. The case directly raises the question of a Tribal Nation's ability to prohibit online sports wagering from occurring on its territory.
Those cases add an important dimension to the state-versus-federal dispute: Tribal sovereignty introduces another layer of governmental authority that cannot simply be treated as an extension of state gambling regulation.
The money and regulatory question.
At stake is more than the terminology used to describe a wager.
State-regulated gaming systems generally include licensing, consumer protections, taxation, responsible-gaming requirements and mechanisms for enforcement. Tribal gaming operates through an additional framework based on Tribal sovereignty and federal law.
Michigan's Gaming Control Board, for example, has responsibilities that include auditing compliance with Tribal gaming compact agreements.
Arizona's gaming compact establishes permitted gaming activities, regulatory standards and Tribal contributions to state and local governments.
California's system also includes payments associated with Tribal gaming, including contributions to state-administered funds.
That means the emergence of a nationwide online sports-contract market potentially creates a regulatory question for Tribal governments: whether a company operating from outside a state can offer what Tribal governments regard as gaming without entering the regulatory framework that governs other gaming operators.
A growing federal-state confrontation.
The Commodity Futures Trading Commission has maintained a central role in regulating prediction markets as financial markets, while states argue that federal commodities law does not eliminate their traditional authority to regulate gambling.
The legal conflict intensified after federal courts issued differing decisions.
The Ninth Circuit's Nevada decision found that federal commodities law did not preempt Nevada's gaming requirements for sports-event contracts. The Third Circuit, meanwhile, reached a different conclusion concerning New Jersey, setting up a conflict that could ultimately require review by the U.S. Supreme Court.
New Jersey has asked the Supreme Court to resolve the question of whether states have authority to regulate sports betting offered through prediction markets.
That petition could transform what began as a series of state enforcement actions into a major national jurisdictional case.
What is at stake for Tribal Nations.
For Tribal Nations across the country, the outcome could have consequences extending beyond sports.
The central questions include whether federal financial-market regulation can override state gaming laws, how those decisions interact with Tribal-state gaming compacts, and how federal protections for Tribal sovereignty apply when online gaming activity reaches Tribal lands electronically.
The distinction is particularly important because Tribal gaming is governed through a unique legal structure rather than simply through state licensing.
If courts ultimately establish that federally regulated prediction markets can operate nationwide without complying with state gaming laws, states and Tribal Nations could face a substantially different regulatory landscape.
If courts instead affirm state authority, as the Ninth Circuit has done in Nevada, prediction-market companies could face a patchwork of state requirements — and, potentially, additional questions concerning Tribal jurisdiction where their services reach Tribal lands.
For Michigan's 12 Tribal Nations, Nevada's Tribal communities and Tribal Nations throughout states participating in the multistate legal campaign, the dispute represents more than a fight over terminology.
It is a test of how American gaming law will adapt to an increasingly digital marketplace — and whether new financial technology can operate outside regulatory systems developed through state law, federal Indian law andernment-to-government agreements with Tribal Nations.
