U.S. Senators accuse X of favoring Polymarket and question whether it provides an unfair competitive advantage.

on November 2, according to foreign media, U.S. Senate Democrats have accused Elon Musk's social media platform X of granting preferential treatment to prediction market Polymarket. In a joint letter first disclosed by Semafor, Nevada Democratic Senator Catherine Cortez Masto, California Democratic Senator Adam Schiff, Nevada Democratic Senator Jacky Rosen, and Connecticut Democratic Senator Richard Blumenthal wrote: “Typically, X allows users to report ads for various reasons. However, when users attempt to report a Polymarket ad through X’s standard interface, they are unable to select a reporting option. This issue does not affect other types of advertisements, including those for Kalshi.”

The letter, accompanied by screenshots, alleges: “This seemingly unfair special treatment raises questions over whether X is attempting to provide Polymarket with an undue competitive advantage, thereby benefiting the U.S. president and his family.” Donald Trump Jr., son of Donald Trump, has invested in Polymarket and serves as an advisor to the platform.