Senate Passes Rule Banning Members From Trading on Prediction Markets

The rule, which received unanimous approval, was designed to stop lawmakers and their staffers from insider trading.

An app for Kalshi is shown in Chicago on Feb. 25, 2026. Scott Olson/Getty Images

The U.S. Senate unanimously voted on April 30 to ban members and their staff from betting on prediction markets such as Kalshi and Polymarket. The rule, aimed to stop senators from insider trading will go into effect immediately.

“Serving in Congress is an honor, not a side hustle,” Bernie Moreno (R-Ohio) wrote in an X post on Thursday. “Americans deserve to know that their leaders are here for the right reason!”