Tribal casinos sue Kalshi after CEO Mansour’s talks implode

Kalshi CEO Tarek Mansour’s private talks with tribal gaming leaders collapsed, ending in lawsuits, the New York Post reports.

The hit

Kalshi CEO Tarek Mansour’s private bid to smooth things over with tribal casino leaders collapsed into lawsuits, the New York Post reports. Talks that began with a March 2025 video call to Pechanga Band member Victor Rocha broke down over accusations of tokenism & doublespeak, ending with tribes filing lawsuits & Rocha telling Kalshi’s Sara Slane: “See you in court.”

Why it matters

The tribes argue Kalshi’s sports event contracts are unauthorised gambling under federal Indian gaming law, not financial instruments as Kalshi claims. With a Supreme Court fight looming, traders watching Kalshi’s sports contracts business face real regulatory risk to the platform’s core revenue.

The record

Kalshi sports betting share	up to 70% of an estimated $4bn revenue over 12 months to July (source close to Kalshi)
Ninth Circuit ruling	ruled against Kalshi in a tribal lawsuit earlier this month (New York Post)
Indian gaming revenue	$46bn taken in last year, up 5.3% (Indian Gaming Commission)
First Mansour-Rocha call	March 2025 video call where Mansour asked Rocha to become an advisor

What happens next

Watch for Kalshi’s expected appeal to the Supreme Court, with tribal lawsuits continuing to press the unauthorised gambling claim.

Sources: Inside Kalshi CEO Tarek Mansour’s testy relationship with Indian casinos

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