[Senators from Both Parties Question Kalshi and Polymarket's Election Betting Insider Trading] According to The Defiant, Democratic Senator Elizabeth Warren and Republican Senator John Curtis sent letters to prediction market platforms Kalshi and Polymarket, demanding explanations on how they prevent insider trading and market manipulation in election betting ahead of next week's midterm elections. They were asked to provide the number of suspected violations intercepted before trading occurred and discovered afterward, with a written response due by November 3rd. According to The Block, the two senators stated in their letter that they still doubt the two companies' ability to adequately regulate such event trading contracts through effective scrutiny and accountability.