Unite Here President Gwen Mills endorsed S. 4160, the Prediction Markets Are Gambling Act, in a 4 June statement. She said prediction markets threaten casino workers and urged the Senate to act as it considers the CLARITY Act.
The endorsement adds labour-sector support for proposed limits on prediction-market sports betting and igaming.
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Nevada Gaming Control Board Chairman Mike Dreitzer said on a podcast that prediction market operators such as Kalshi are running illegal sportsbooks, and that Nevada has no fallback plan if the Supreme Court sides with them. He urged tribes and licensees to hold firm, even though several tribes have partnered with Kalshi this month. The comments followed a CFTC interim rule of 9 October excluding casino-style gambling products from the definition of a swap, alongside a proposed rule covering event contracts.
Donald Trump expressed support for US leadership in prediction markets during White House remarks on 19 August. State gambling regulators argue that sports contracts constitute betting requiring state licences, while platforms operate under CFTC oversight. The report cited Kennedy Forum estimates that sports account for 75%–90% of Kalshi’s trading volume and roughly half of Polymarket’s activity.
The NCLGS adopted a resolution supporting state authority over sports-betting and gambling policy. Its executive committee approved the position unanimously amid the debate over prediction markets.
Reportedly, Culinary Workers Union Local 226, Las Vegas's largest labour union, supports a federal bill to block prediction markets from trading on sports and casino-style events. Nevada's congressional delegation is prominent in the Washington push to change which events prediction markets may offer.
President Donald Trump said the Commodity Futures Trading Commission should have sole authority over prediction markets and that state regulators should not interfere, according to reports. The coverage also says Minnesota enacted a law intended to block prediction-market operators, while federal authorities responded with legal action asserting federal authority. Kalshi and Polymarket maintain that they operate as federally regulated exchanges, not gambling businesses.