Seven House Democrats sent a letter Tuesday to CFTC Chair Michael Selig demanding an explanation for why the agency has not enforced existing rules against offshore prediction markets listing contracts tied to war, assassination, and military conflict. The letter, filed April 7, names both Polymarket and Kalshi and arrives against a backdrop of suspicious trading patterns linked to U.S. strikes on Iran and Venezuela earlier this year.

The letter centers on 17 CFR 40.11, a CFTC rule already on the books that bars CFTC-Designated Contract Markets from listing contracts that "involve, relate to, or reference terrorism, assassination, war, gaming, or an activity that is unlawful." Democrats argue the regulator has the authority and the legal obligation to act, and that Selig's CFTC has instead moved in the opposite direction. Since taking over under the Trump administration, Selig withdrew a proposed ban on political and event contracts, issued a Prediction Markets Advisory on February 25, 2026, and directed staff on March 9, 2026 to draft more permissive rules for the sector through an advanced notice of proposed rulemaking. On April 2, the administration went further, filing suits against Arizona, Connecticut, and Illinois to block those states from regulating prediction markets on their own.

The April 7 letter is the latest in a series of Democratic actions on this issue spanning six weeks. A Senate letter went out February 23. Senator Adam Schiff and Rep. Mike Levin introduced the DEATH BETS Act on March 11, which would write a statutory ban on war, death, and assassination contracts into law, removing CFTC's discretion entirely. The BETS OFF Act followed on March 17, introduced by Sen. Chris Murphy, Rep. Gabe Amo, Rep. Greg Casar, and Rep. Suhas Subramanyam. That bill targets prediction markets that allow bets on government actions where a participant already knows or controls the outcome, and includes criminal penalties and payment-system enforcement against offshore operators.

At the heart of the controversy is a cluster of trades placed on Polymarket hours before a February 28 U.S.-Israeli strike on Iran. Analytics firm Bubblemaps identified six newly created accounts that collectively netted $1 million. A separate on-chain analysis found 38 accounts believed controlled by a single person that earned over $2 million, with each account placing between four and ten bets at close to a 100 percent success rate, all within a one-hour window on February 27 between 11:00 and 12:00 GMT. A CNN investigation identified a single trader who made nearly $1 million across multiple Iran-related markets with a 93 percent win rate on unannounced military operations. Total volume traded on Polymarket's Iran bombing markets reached $529 million. Traditional markets showed parallel anomalies: approximately 6,200 Brent crude and WTI oil contracts, representing $580 million in value, changed hands in a 15-minute window before President Trump announced the strikes at 7:04 AM, and S&P 500 e-Mini futures registered a $1.5 billion notional buy in the same period. A similar pattern preceded a January 2026 U.S. military strike on Venezuela, a widely reported operation that resulted in the removal of Nicolás Maduro from power. In that case, one trader pocketed over $400,000 by correctly predicting the outcome hours in advance.

Senator Adam Schiff framed the issue in stark terms in his February letter to Selig: "These contracts present dangerous national security risks, including creating incentives to incite violence, foment geopolitical conflicts, and disclose classified information." Economist Paul Krugman pointed more directly at the Iran trades: "Somebody close to Trump knew what he was about to do, and exploited that inside information to make huge, instant profits." Selig himself has publicly acknowledged the oversight stakes, warning that "unregulated prediction markets could be the next FTX," even as his agency pursues deregulatory rulemaking for the sector. Polymarket updated its market integrity rules in response to the scrutiny, banning trading based on "stolen confidential information" or by individuals with "a position of authority or influence" over an outcome. The platform's chief legal officer, Neal Kumar, defended the changes: "Markets thrive on clarity. These rule enhancements make expectations clear for all participants." Kalshi, also named in the House letter, added enhanced surveillance technology and a whistleblower feature as part of its own self-regulatory response. Ben Schiffrin of Better Markets pushed back on that framing: "Insider trading regulation does not work if left to platforms to police themselves."

The Justice Department has reportedly spoken with prediction market firms about potential insider-trading cases, according to CoinDesk, but no charges have been filed.

The stakes extend well beyond U.S. borders. Polymarket, which runs on the Polygon blockchain and settles bets in USDC stablecoins, reported $12 billion in monthly trading volume in January 2026 and operates in over 160 countries. India is among its most active non-U.S. markets, where the platform offers more than 50 India-specific contracts covering Reserve Bank of India rate decisions, Lok Sabha elections, India-Pakistan geopolitics, IPL outcomes, and GDP forecasts. Users access the platform through exchanges like CoinDCX and Binance P2P to fund accounts in USDC. India currently has no framework specifically covering prediction markets. If the CFTC pursues extra-territorial enforcement and targets Polymarket's infrastructure, Indian and other regional users could face platform access restrictions or frozen withdrawals at the stablecoin layer, regardless of local law. Users in Pakistan, Bangladesh, and Sri Lanka face a comparable grey-zone risk, as those countries also lack specific prediction market frameworks and could see access disrupted through the same payment-rail mechanisms. Singapore's Gambling Regulatory Authority has already restricted Polymarket access following a 2025 crackdown, signaling that regulatory contagion is already spreading through the region. In Africa, South Africa is tightening exchange controls around crypto assets, and both Nigeria, under its Investments and Securities Act 2025, and Kenya, under the Virtual Asset Service Providers Act signed in October 2025, have new digital asset frameworks that could be read to cover offshore derivatives settled in stablecoins. The practical risk for users in those markets is a disruption to payment rails rather than direct enforcement action.

The regulatory trajectory now points toward a direct confrontation between Democratic lawmakers pushing for statutory bans and a CFTC under Selig that is actively working to legitimize the prediction market sector. Whether the DOJ's conversations with platforms lead to charges, and whether Selig responds to the House letter, will determine whether this remains a political fight or becomes a compliance crisis for every offshore event-contract protocol with U.S. user exposure.