Polymarket says it is ending its paid relationship with former U.S. Representative George Santos as federal regulators investigate his trading activity tied to a rival prediction market. Multiple reports state that the probe focuses on whether Santos may have violated insider trading or related laws through bets made around events he was connected to. In particular, the investigation includes claims that Santos may have placed wagers against his own attendance at President Donald Trump’s State of the Union address. Polymarket’s decision removes any compensation arrangement involving Santos while the matter is examined by regulators. The reports also describe the broader context as part of scrutiny of prediction markets and how they operate, including concerns about whether participants have access to nonpublic information. The outlets agree on the core points: Polymarket terminates a paid relationship with Santos, and the move comes as investigators review his trading activity on a different platform. No resolution of the allegations is reported in the articles.