California Tribes Weigh Three 2028 Sports Betting Models

California's tribal gaming leadership is weighing how a tribe-led sports betting initiative could be structured on the 2028 ballot, and the question of which commercial partners may participate has moved from theory to correspondence. According to reporting by Capitol Weekly, republished in October 2026, the California Nations Indian Gaming Association (CNIGA) sought input from commercial operators in June on three possible models, and leaders of major sportsbooks have since written to CNIGA promising to work exclusively with tribes. The 2028 California sports betting ballot measure remains in the planning stage, but the outlines of the negotiation are visible.

Three models under discussion

The Capitol Weekly account, which quotes CNIGA Chairman James Siva and Indian Gaming Association conference chairman Victor Rocha, describes three structures CNIGA put to commercial operators in June 2026: a single tribal platform, tribally branded platforms, or co-branded platforms that pair tribes with established operators. Each answers a different question about who holds the customer relationship, who carries technology risk and how revenue is divided among tribes of very different sizes.

A single tribal platform would concentrate brand, data and technology in a tribal-controlled entity, offering the clearest sovereignty story but demanding the largest upfront build and the most consensus among California's many tribal governments. Tribally branded platforms would let individual tribes or groups of tribes operate under their own names, typically using licensed technology from a vendor, which preserves local identity but fragments the user base. Co-branded platforms would place a recognizable commercial sportsbook alongside a tribal partner, trading some brand control for player acquisition and operational experience. Our analysis of platform independence in tribal sports betting examines the technology trade-offs behind such choices.

The operators' letter

The article reports that last month the leaders of DraftKings, FanDuel and other sportsbooks sent CNIGA a letter promising to work exclusively with tribes and to close their prediction market platforms once legal sports betting arrives in California. DraftKings and FanDuel said they remain committed to working with tribal groups. Kalshi did not respond to a request for comment, according to the report. The letter is a statement of intent rather than a binding contract, and its practical value will depend on what commitments appear in the final initiative language and in any operator agreements that follow.

The timing is notable. DraftKings and FanDuel launched prediction-market products in late 2025, and the Capitol Weekly piece notes that FanDuel describes its California activity as "trades" rather than sports betting. Tribal leaders have framed prediction markets as the largest threat to tribal gaming, and the operators' letter amounts to an acknowledgment that access to a California ballot coalition may require stepping back from that business.

A possible exclusion clause

Rocha told Capitol Weekly that tribes are preparing a 2028 initiative that would bar any sportsbook that partners with a prediction market. He said Caesars, Boyd and Hard Rock would benefit under such a plan. Siva described the group's focus as a tribe-led initiative and said nothing is off the table, including tribal-only sports betting. Our earlier report on the partner-exclusion concept traces how that clause could operate. The point of the mechanism is leverage: operators wanting access to California's market would have to choose between prediction markets and a tribal partnership.

Several tribes have already complicated that picture. The report says three California tribes, including the Alturas Indian Rancheria in Modoc County, have partnered with Kalshi. Siva called the decision disappointing but said he would not hold it against them. The split mirrors a national divide, covered in our piece on Kalshi partnerships and Indian country.

Lessons carried from 2022

The 2022 campaign shapes how tribal leaders talk about 2028. Proposition 26, backed by gaming tribes, would have allowed in-person sports betting at tribal casinos and racetracks. Proposition 27, backed by DraftKings and FanDuel, would have legalized online sports betting. Neither passed, and the contest was described as the most expensive ballot fight in U.S. history. Tribes regarded the result as a win because they retained control of the state market. In April 2025, DraftKings and FanDuel executives said publicly that sports betting would not happen in California without tribal cooperation, a position the new letter appears to formalize. California tribal exclusivity itself rests on Proposition 1A, approved by voters in 2000.

What remains unsettled

Much could change before 2028. The litigation over prediction markets is moving in parallel: a federal court recently enjoined Kalshi from offering sports contracts on two tribes' lands, as we reported in our coverage of the Blue Lake remand, while other courts have ruled differently, and the U.S. Supreme Court may yet be asked to decide the preemption issue. Federal regulators are also considering rule changes. A ballot measure drafted before those questions resolve will have to anticipate several outcomes.

Equally open is how revenue would be shared among California's more than a hundred federally recognized tribes, which vary widely in size and in appetite for digital wagering. The broader California picture is available in the California state hub. Readers seeking context on how sports wagering fits within the compact framework can consult the Legal Guide.