Senators Ban Themselves from Prediction Markets, Handing Industry a PR Win

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Senators Lock Themselves Out of the Polymarket Casino — and Hand the Industry a PR Win

This rule applies only to senators and their staff – it doesn’t include members of the House of Representatives, the President’s administration, the Federal Reserve, or other Washington officials. It also doesn’t regulate the prediction market platforms themselves, which are still overseen by the CFTC as financial exchanges. Essentially, it prevents a senator from using inside information about upcoming committee decisions to profit from bets on those decisions.

Senator Ted Cruz’s recent vote to ban senators from participating in prediction markets was accompanied by a statement from Senator Marco Moreno, who argued that it’s inappropriate for senators to gamble with taxpayer money. He emphasized that serving in Congress should be considered a full-time honor, not a way to make extra income. Senate Minority Leader Chuck Schumer, as reported by Politico, agreed with the decision and encouraged Speaker Mike Johnson and the Biden administration to implement similar rules for the House of Representatives and the executive branch.

The platforms have an unusual reaction: gratitude

The leaders of both Kalshi and Polymarket, two major prediction market platforms, publicly supported the bill. Tarek Mansour, founder of Kalshi, stated on X (formerly Twitter) that the Senate’s action would help build confidence in their markets, and highlighted that Kalshi already prevents members of Congress from participating and actively works to prevent insider trading. He called on the House of Representatives to pass a similar law. Polymarket expressed full support, explaining that their existing rules already forbid the prohibited behavior, and making it law would be a positive development for the industry.

As an analyst, I’m seeing a clear pattern here. The biggest threat to these prediction platforms – companies like Polymarket and Kalshi currently valued at over ten billion dollars – isn’t necessarily regulation itself, but the *perception* that they’re being used by political insiders. Every time we discover someone with security clearances trading on these platforms, it undermines their claim to be unbiased forecasting tools and makes it harder to argue for federal oversight over state-level challenges. Frankly, these platforms would prefer to lose a small number of traders with connections to Washington D.C. than keep getting negative press about insider activity.

Why now: the Maduro trade

The event that sparked the investigation was clear. In late January, someone using the online name Polymarket bet around $400,000 that Venezuelan President Nicolás Maduro would be removed from power by the end of the month, and won when he unexpectedly stepped down. Last week, Gannon Ken Van Dyke, a 38-year-old active-duty US Army soldier, was arrested and accused of using secret military information to make those successful bets. Van Dyke has denied the charges, but the sequence of events – a source within the military, a political development in Latin America, and a large payout through cryptocurrency – provided exactly the evidence needed by Moreno and those supporting his efforts.

Several states began taking action on prediction markets. In March, California’s governor issued an order preventing state workers from using inside information on these platforms. New York and Illinois quickly followed suit in April with similar rules. Tennessee went further, sending warnings to Kalshi, Polymarket, and Crypto.com regarding concerns about illegal sports betting earlier this year. With no federal laws in place, this lack of regulation at the national level became noticeable. Senate Resolution 708 now addresses this issue for the Senate.

The conflict the bill doesn’t reach

A notable detail emerged regarding Kevin Warsh, the nominee to replace Jerome Powell as Fed chair. He reported owning small amounts of both Solana and Polymarket in documents submitted for confirmation. While this disclosure is permitted and the holdings are minor compared to his overall wealth, and the Fed already has ethics rules (strengthened after a 2022 incident), it looks problematic that the potential new chair has investments in a platform where people can wager on Federal Reserve interest rate decisions. A recent resolution proposed by Moreno doesn’t address this issue.

It also doesn’t reflect what’s happening in prediction markets, where real decisions are being made. For example, Polymarket currently gives about a 12% chance to the Federal Reserve cutting interest rates by the end of 2026 – a chance that decreased in April as oil prices stayed high and the Fed held rates steady for the third time. Kalshi offers similar contracts with government oversight. Crucially, information about the Fed’s future actions is still being traded, and those with inside knowledge aren’t facing any restrictions.

What it means for the industry

This is a clear positive development for prediction markets. The recent resolution essentially gives them federal approval, confirming that the way they operate—using event contracts overseen by the CFTC—should be safeguarded against insider activity, not shut down. Kalshi and Polymarket can now use this Senate resolution as proof in any legal challenges over the next year and a half that Congress recognizes them as legitimate financial markets, not illegal betting sites.

The real challenge lies in making sure this rule is followed. While the resolution establishes a new guideline, it doesn’t create any new systems to oversee compliance. Senators will largely be responsible for policing themselves, with platforms using their existing data monitoring as additional support. It’s possible to verify Kalshi’s statement that it proactively prevents members of Congress from participating, but Polymarket’s setup – where users control their own funds through smart contracts – is more difficult to monitor. The company’s recent purchase of QCEX and shift towards full US regulation are, in part, an attempt to address this oversight.

The Senate has addressed the simplest part of the issue: prohibiting its own members from trading stocks. However, they’ve left the more complex challenges – involving the House of Representatives, the President, the Federal Reserve, and anonymous financial accounts – for future lawmakers to tackle. While the industry received the public outcome it desired, the core problem of insider trading within Congress remains unresolved.

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2026-04-30 22:51