Polymarket Flags Suspicious Midterm Election Bets as $24M House Market Heats Up

Polymarket is investigating dozens of suspicious midterm election bets, with at least two cases referred to federal regulators. The move comes as its prediction markets forecast a Democratic takeover of Congress and traders wager millions on races that could reshape Washington’s political balance. With the Nov. 3 midterm elections approaching, Polymarket’s compliance operation is examining potentially improper trading activity across a sprawling election marketplace encompassing 506 individual markets. An NPR investigation published Oct. 27 revealed that the prediction market operator has investigated “dozens” of election-related bets.