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U.S. Senate Unanimously Bans Senators From Prediction Market Trading

According to Senate proceedings, the chamber approved a rules change by unanimous consent that immediately bars senators and Senate staff from using prediction markets including Polymarket and Kalshi.

Fact Check
The claim is strongly supported by multiple independent sources. CNBC's April 30, 2026 article explicitly states 'The U.S. Senate unanimously passed a rule Thursday barring senators from trading on prediction markets, effective immediately.' The Hill corroborates the legislative origin via Senator Moreno's resolution and his stated intent for unanimous passage. The X post linked in the claim also confirms the unanimous ban. All sources are consistent with one another, and the CNBC article provides detailed context (Kalshi enforcement actions, DOJ arrest) explaining why the Senate acted. No conflicting evidence was found.
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Summary

The U.S. Senate approved a resolution by unanimous consent that immediately bans senators and Senate staff from using prediction market platforms, including Polymarket and Kalshi. The measure, previously identified as S. Res. 708, was authored by Senator Bernie Moreno and adopted as a change to the chamber’s standing rules. The new report adds named platforms covered by the restriction while reinforcing that the ban explicitly applies to both lawmakers and staff.

Terms & Concepts
  • Prediction market: A marketplace where users trade contracts tied to the outcomes of future events, such as elections or policy decisions.