Elizabeth Warren Plans Prediction Market Crackdown as She Prepares to Chair Senate Banking

Warren's agenda includes investigating prediction markets and election betting platforms for insider trading and manipulation. This continues her earlier bipartisan effort with Sen. John Curtis, R-Utah, who joined her in writing to Kalshi and Polymarket executives on Oct. 28.

The senators expressed particular concern about election-related event contracts, noting how they're treated as political indicators and citing cases of candidates betting on their own races. They referenced research alleging wash trading and volume manipulation on Polymarket, as well as an NPR investigation of campaign insiders trading ahead of polling releases.

Regulatory Concerns

Warren and Curtis wrote that 'the identification of isolated instances of improper trading does not demonstrate that these markets are adequately protected.' They demanded written responses from both companies by Election Day, Nov. 3. Kalshi's enforcement head responded that they 'proactively blocks candidates and campaign staff from trading,' while Polymarket did not comment.

Crypto Connection

Prediction markets aren't tangential to crypto policy. Polymarket operates as a crypto-native venue that settled U.S. access through a CFTC-registered exchange, while Kalshi functions as a designated contract market under the Commodity Futures Trading Commission. Both fall under the Banking Committee's jurisdiction.

The CFTC, under Chairman Michael S. Selig, has spent 2026 defending these platforms against state gambling laws by suing states like Wisconsin and New York to assert federal jurisdiction. Warren's stance represents a direct counterweight to this approach.

Warren has been one of crypto's sharpest critics in Congress, opposing the CLARITY Act market structure bill that failed in September. With Democrats controlling both chambers, her committee chairmanship signals a tougher regulatory environment for prediction markets and related crypto platforms.

Broader Agenda

Beyond prediction markets, Warren's agenda includes affordability legislation, credit card interest rate caps, AI chip export controls, and oversight of Trump administration officials, Wall Street CEOs, Big Tech executives, and anyone tied to the Trump family's crypto ventures.

The key question now is whether Warren will use her subpoena power and committee gavel to turn the Kalshi and Polymarket letters into formal hearings that could rewrite how election and event contracts are policed, fundamentally changing the regulatory landscape for these platforms.