Three injunctions, one lawsuit and a Chrome ban: prediction markets just had their roughest legal week
One week after the record books closed on the biggest month in prediction-market history, the legal system delivered its reply. In the space of days: a Michigan judge granted a temporary restraining order requiring Kalshi to halt sports event contracts in the state — making Michigan the third state with an injunction against the exchange, after Nevada and Massachusetts — while Nevada's Supreme Court denied Kalshi's emergency motion for a stay pending appeal. Polymarket, meanwhile, went on offence, suing New Mexico Attorney General Raúl Torrez and state gaming officials over enforcement threats (all per Gambling Insider's weekly roundup).
The week's scorecard
| Front | What happened | Who it hits |
|---|---|---|
| Michigan | Judge approved a TRO halting Kalshi's sports contracts — third state injunction after Nevada and Massachusetts | Kalshi |
| Nevada | State Supreme Court denied Kalshi's emergency stay pending appeal | Kalshi |
| New Mexico | Polymarket sued AG Raúl Torrez and gaming officials over an "immediate threat" of enforcement | Polymarket (plaintiff) |
| Washington (CFTC) | Long-awaited proposed rule published: a formal contract-by-contract review process for event contracts | Whole category |
| Chrome Web Store to prohibit extensions facilitating real-money prediction-market trading — enforcement from August 1; 50+ tools reportedly at risk | Third-party trading tools |
Per Gambling Insider's Prediction Markets Weekly Roundup and the regulation timelines maintained by Covers, RotoWire and The Lines, July 2026. Officials in at least 11 states had already issued formal cease orders as of early July, with legal fights underway in more than a dozen.
The BetG8 read: overhang, not obituary
The map is fragmenting, not closing. Three states with injunctions and eleven with cease orders still leaves the large majority of the US market untouched, and the CFTC's proposed rule points at regulation rather than prohibition — a contract-by-contract review is the administrative opposite of a ban. But fragmentation has a price: it recreates precisely the state-by-state patchwork that federal pre-emption was supposed to spare the exchanges.
Watch the Chrome deadline. August 1 is the nearest hard date on the calendar. Google policing the browser layer doesn't touch the exchanges directly, but it strips out part of the third-party tooling ecosystem that grew up around Polymarket during the boom — and it signals that platform gatekeepers, not just regulators, are now pricing prediction markets as gambling-adjacent.
The asymmetry to remember: record volumes strengthen both arguments. For the platforms, $50B+ months prove consumer demand; for the states, they prove the size of the untaxed leak. That is the same tension we documented at the July 21 hearing — now with case numbers attached. Nothing about the category's legal foundation got settled this week. It got contested in three more courtrooms.
Sources: Gambling Insider Prediction Markets Weekly Roundup, July 2026 (Michigan TRO, Nevada Supreme Court denial, Polymarket v. Torrez); Covers prediction-markets regulation timeline and The Lines regulation tracker, July 2026 (CFTC proposed rule, Chrome Web Store policy, state cease orders); CNBC, July 2026 (Kalshi volume mix). Analysis, not legal or betting advice.