Senators ban themselves from prediction markets after candidates bet on own races

The U.S. Senate voted unanimously to ban senators and Senate staff from participating in prediction markets . The action was prompted by insider trading concerns, particularly after Kalshi suspended and fined a Senate candidate and two House candidates for betting on their own races . The measure was approved as a change to Senate rules and took effect immediately .

Source: Ars Technica | 2026-05-01