Senators from both parties have raised concerns about election-related prediction markets ahead of the midterm elections, demanding details from two major platforms—Kalshi and Polymarket—on how they prevent insider trading, manipulation, and bets based on confidential information. The letter highlights regulatory uncertainties surrounding these speculative markets, which allow users to trade on political outcomes. Lawmakers are seeking transparency on safeguards in place to ensure fair play and compliance with financial laws. Critics argue such platforms could undermine public trust in elections by enabling speculative wagering tied to voting results.


A bipartisan pair of senators are pressing Kalshi and Polymarket over prediction markets tied to the Nov. 3 midterm elections.  “We write to express concerns about election-related prediction markets and to request specific information about your companies' efforts to prevent insider trading, market manipulation, and wagers based on material nonpublic information,” Sens. Elizabeth Warren (D-Mass.)...