Warren and Curtis seek election trading safeguards from prediction platforms
Senators Elizabeth Warren and John Curtis wrote to Kalshi chief executive Tarek Mansour and Polymarket chief executive Shayne Coplan asking how the platforms stop candidates, campaign staff and others with nonpublic information from trading on election contracts. The letter sets seven questions with written answers due November 3 and asks how many suspected cases each platform has found since January 1 and how many were referred to the CFTC.
Senators Elizabeth Warren and John Curtis have asked Kalshi and Polymarket to explain how they prevent election-contract trading by people with access to nonpublic information, according to Bitcoin.com.
Platforms face November 3 response deadline
The senators addressed their letter to Kalshi chief executive Tarek Mansour and Polymarket chief executive Shayne Coplan. Their questions concern safeguards against trading by candidates, campaign staff and others who hold information unavailable to the public.
The letter contains seven questions and requests written responses by November 3, according to Bitcoin.com. The reporting was published on Nov 1, 2026, at 1:00 PM ET.
Senators seek detection and referral counts
Beyond asking how the safeguards work, Warren and Curtis want each platform to disclose how many suspected cases it has identified since January 1. They also ask how many cases were referred to the CFTC.
Those requests distinguish between suspected activity detected by a platform and cases passed to the regulator. The supplied summary includes neither platform’s answers nor any case counts.
What it means for prediction markets
- The inquiry focuses on access to nonpublic election information, making the platforms’ controls on candidate and campaign-staff trading a central issue.
- The requested detection and referral figures could provide insight into how each platform handles suspected cases; the available material does not establish that violations occurred.
- November 3 is the deadline for written answers, not a stated date for regulatory action or changes to election contracts.
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