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Senate Bans Prediction‑Market Bets by Senators and Staff as Regulatory Fight Intensifies

The vote underscores concern about insider use of nonpublic information on platforms whose oversight is still in dispute.

Overview

  • The Senate, which approved the ban by unanimous voice vote Thursday, put it into effect at once for all senators and their staff.
  • Prosecutors charged Army soldier Gannon Ken Van Dyke with using classified details about a planned operation to profit by more than $400,000 on a bet tied to the capture of Venezuela’s Nicolás Maduro.
  • Platforms say they are tightening controls, with Kalshi fining and suspending three candidates who wagered on their own races and Polymarket flagging the Maduro trade to authorities.
  • The CFTC’s proposed rules for event contracts drew more than 1,500 public comments, with Kalshi, Polymarket, and Andreessen Horowitz urging the agency to keep exclusive oversight while several state regulators pressed to treat some markets as gambling.
  • Courts are now a battleground as the CFTC sues states including Arizona, Connecticut, Illinois, New York, and Wisconsin over jurisdiction, while lawmakers push new bills that could bar federal officials from betting or restrict certain markets.