Rep. Seth Moulton bans staff from using prediction markets like Kalshi, Polymarket

Congressional lawmakers are ramping up efforts to rein-in prediction markets.

Rep. Seth Moulton, D-Mass.,, on Wednesday announced an office-wide policy barring his congressional staff from using prediction market platforms like Kalshi and Polymarket.

"Congressional staff and the Members they work for exist to serve the constituents of the districts they represent, not to profit off of the very policy decisions and world events that we are here to respond to," Moulton said in a statement posted to X. "My office has not, and will not, engage in these trades that run counter to every principle of a clean, honest a government that works for the people."

A spokesperson for Moulton said he believes the policy is the first of its kind on Capitol Hill. It comes amid a wave of proposals from lawmakers seeking to rein-in prediction markets, which allow users to place bets on the outcome of a wide-range of events, from basketball games to Oscars best picture winners.