Warren, Curtis Press Kalshi and Polymarket on Election Trading Safeguards

WASHINGTON – Sens. Elizabeth Warren, D-Mass., and John Curtis, R-Utah, put seven questions to Kalshi and Polymarket about how their election trading safeguards perform, including how many suspected violations were stopped before trades occurred, with written answers due Nov. 3. The senators’ Oct. 28 letter is addressed to Tarek Mansour, Kalshi’s chief executive, and Shayne Coplan, chief executive of Blockratize Inc., which does business as Polymarket. Warren is the top Democrat on the Senate Banking Committee. The letter follows the Senate’s April 30 adoption of a prediction market insider trading ban that applies to senators and Senate staff.