Comer Calls for Limits on Officials' Prediction Market Trading

The Block reported on November 13 that James Comer, chairman of the US House Committee on Oversight and Reform, called for new rules restricting government officials' use of prediction markets. The report said lawmakers could consider a full trading ban for those officials, while his inquiry examines insider-trading risks linked to their activity.

"Congress should consider additional reforms to prevent public corruption and restore Americans' trust in government," Comer said.

His statement places access restrictions within a broader accountability argument: participation by public officials can create conflicts between public duties and private trading positions.

Would the restrictions cover all traders?

As described in the report, the proposed curbs target government officials rather than all customers of prediction market platforms. A full ban would prevent covered officials from taking positions; narrower reforms could limit their access without excluding every user.

The published account does not set out which offices or roles would qualify. That scope would determine where enforcement sits: a platform-level prohibition would require Polymarket and Kalshi to identify covered accounts and stop trading from them, rather than rely solely on officials' restraint.

What did Polymarket and Kalshi receive?

Comer launched the inquiry by asking Polymarket and Kalshi to submit materials on three operational areas:

• User identity verification
• Enforcement of geographic restrictions
• Detection of unusual trading activity

The requests seek information about the systems that determine who can trade, where access applies, and how suspicious conduct gets identified.

No financial total accompanies the request, and The Block's account does not report an allegation against either platform. It also identifies no individual official, transaction or market as the subject of suspected misconduct. At this stage, the published record describes document collection rather than a finding of wrongdoing.

For both companies, the immediate task is to account for the controls behind those requests. Identity verification, geographic enforcement and unusual-activity detection sit at the point where access and monitoring decisions are made.

Those are the areas identified in Comer's requests, not new requirements announced by either company. The published account does not say whether the platforms have responded, what records they will provide or how long they have to comply.

What would a trading ban change?

A categorical prohibition would shift the main control point from an official's judgment to the platform's account-level enforcement. Polymarket and Kalshi would need a reliable way to classify covered users and prevent new positions, alongside a process for handling accounts that already hold positions.

The material provided does not describe an adopted ban, implementation date or transition period. A narrower rule would still require the same basic data: a clear class of restricted people and enforceable checks at account opening and trading.

The distinction matters because an access rule operates before a trade, rather than only after one. That would place additional identity and monitoring work on the two platforms, even if the final restriction covers only a subset of officials.

What is the next checkpoint?

The next measurable step is a response from Polymarket and Kalshi, or a congressional proposal specifying which officials would be affected. The account provides no submission deadline and identifies no sanction for a breach.

Until those details emerge, the inquiry remains centered on verification, access and monitoring rather than a stated dollar loss or completed enforcement action. A defined response deadline would determine when the document request becomes a concrete test of the platforms' controls.