
Senators want sports prediction markets to stay under state and tribal law, not CFTC control. Polymarket now puts Clarity Act odds at 23% for 2026.
Senators are moving to change the Clarity Act so sports prediction markets remain under state and tribal gaming law, not federal commodities oversight. The proposal surfaced this week at a Senate Indian Affairs Committee roundtable.
Indian Gaming Association Vice Chairman Tehassi Hill told the committee that prediction markets tied to sports and casino events should not bypass existing gaming rules. State gaming laws and the Indian Gaming Regulatory Act should govern those contracts, he said, not federal commodities law.
Tribal groups worry that broader federal oversight would weaken local control over sports wagering. That authority has traditionally sat with states and tribes. Sen. Tina Smith of Minnesota said lawmakers could attach similar language to the Clarity Act or the Farm Bill, a vehicle Congress routinely uses for policy items outside agriculture. The fix, Smith said, should be simple: the Commodity Futures Trading Commission should not override tribal-state agreements.
CFTC Chair Michael Selig has said the agency holds exclusive jurisdiction over prediction markets. The CFTC has challenged state enforcement actions in court on that question. The Trump administration backs Selig. Officials have called federal oversight of prediction markets critically important.
States disagree. Attorneys general from 44 states asked the CFTC in June to withdraw its proposed rule, Rule 40.11, arguing the agency went beyond the authority Congress granted under the Commodity Exchange Act.
Senate Agriculture Committee Chair John Boozman said he sympathizes with tribal gaming concerns. He questioned whether the Clarity Act is the right vehicle, noting that crypto and prediction markets are separate topics.
Regulatory disputes have not slowed trading. Kalshi and Polymarket, together with Polymarket US, recorded $50.59 billion in July trading volume, the highest monthly total on record for the three platforms. Kalshi accounted for about $37.7 billion, roughly 74.5%. Polymarket US posted the fastest growth after opening access to more U.S. users.
Open interest across the three platforms fell from about $2 billion at the start of July to around $1.2 billion by month's end. The drop followed the settlement of positions tied to the FIFA World Cup.
The Senate faces an Aug. 5 deadline to advance the Clarity Act before its summer recess. Prediction market odds have slid; Polymarket now puts a 23% chance on the bill becoming law in 2026, down from 82% in February.
Bitwise chief investment officer Matt Hougan said a failed vote this week would leave the bill stalled, not dead. Congress could still pass it in September or during a year-end session. Hougan said the industry has a fallback: the joint SEC-CFTC interpretation from March that classifies Bitcoin and other assets as digital commodities.
SEC Chair Paul Atkins said last week his agency is ready to issue rules covering the same ground as the Clarity Act. Only Congress can make that protection permanent, he added.
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