Warren-Curtis letter targets election market manipulation controls

Senators Elizabeth Warren and John Curtis sent a bipartisan letter to Kalshi CEO Tarek Mansour and Polymarket CEO Shayne Coplan demanding specifics: what safeguards exist, what enforcement actions have been taken, and what suspected violations have been referred to the CFTC. The letter names two categories of conduct the senators believe the current controls have failed to catch — insider trading by candidates on their own electoral prospects, and coordinated manipulation affecting price formation across large portions of a market.

The candidate trading problem arrived with a name attached. Mark Moran, a former Virginia Democratic Senate candidate, described registering on Kalshi with his driver's license and then purchasing a contract on his own race. Kalshi's disciplinary notice confirms he placed two trades on January 27, 2026, and subsequently promoted the market on social media. He declined to settle. The CFTC separately documented a 2025 incident involving a different candidate discovered through social media video before penalties were imposed. Kalshi's head of enforcement, Robert DeNault, has said the exchange uses FEC payroll records to screen restricted traders. The senators' letter is, in part, a question about what that screen missed and how many times.

The manipulation allegation is larger and harder to bound. The letter references conduct on Polymarket during the 2024 presidential election that reportedly affected roughly one-third of that market's trading volume. The CFTC has jurisdiction over event contracts under the Commodity Exchange Act, and manipulation of a CFTC-regulated market triggers enforcement authority under 7 U.S.C. § 9 — a provision that does not require a showing of completed harm, only that a person attempted to affect price artificially. Whether the Commission has opened a formal investigation into the 2024 conduct is not on the public record.

My read is that the letter is being assessed as political pressure in most of the coverage, and I think that framing misses the mechanism. Warren and Curtis are not writing to embarrass two companies. They are building a record. A bipartisan Senate record of specific, documented failures — a named candidate, a confirmed trade, a compliance department that was notified and then watched him promote the market anyway — is the predicate for two things: a referral to the CFTC demanding a formal response, and a legislative vehicle if the CFTC declines to act. The senators asked for information about prior enforcement actions and suspected violations referred to the Commission. That is not a rhetorical move. That is discovery without a court order.

The legal standard that matters here is found in CFTC Regulation 180.1, which prohibits any manipulative or deceptive device in connection with a contract of sale of any commodity in interstate commerce. The standard does not require proof of price impact. It requires only that the person acted with scienter — that they knew, or recklessly disregarded, that their conduct would operate as a fraud or manipulation on the market. Whether the trading activity documented in the senators' letter meets that threshold, and whether the Commission will be asked to make that determination formally, is the question the letter was designed to force onto the record.