Key points to remember:
- Senator Bernie Moreno led the U.S. Senate to pass a unanimous ban on prediction market negotiation on April 30, 2026.
- Prediction platforms like Polymarket and Kalchi seen 2026 volume is rising amid growing insider trading scandals.
- Senate Rule XXXVII now prohibits 100 members from betting on event contracts to ensure public confidence in politics.
Senator Bernie Moreno leads Senate action to ban betting on event contracts
Introduced Taken by Sen. Bernie Moreno (R-OH) just a week ago, the measure amends the Senate Rules to address growing ethical concerns. This decision follows a series of high-profile scandals where non-public information was allegedly used for profit on event platforms.
The resolution, which came into force immediately upon its adoption on April 30, targets the rapidly growing sector of event contracts. Platforms like Polymarket And Kalchi have grown in popularity during the 2026 election cycle, allowing users to bet on everything from military operations to legislative votes.
By amending Article XXXVII, the Senate has actually loop its members from these digital gaming centers. The new text explicitly prohibits any member from entering into contracts whose payments depend on the occurrence or non-occurrence of a specific event.
Moreno, who has sharply criticized Congress’s “side hustles,” framed the resolution as a necessary step to restore public integrity. He argued that treating the U.S. Senate as a means for personal financial gain constitutes a fundamental betrayal of the American people.
The campaign for the ban was accelerated by two major incidents in late April that shook the industry. On April 22, the regulated stock market Kalchi fined three congressional candidates for betting on their own races, raising alarms about market manipulation.
A day later, news came that a U.S. Army Special Forces soldier was being killed. arrested for allegedly using classified information to make over $400,000 on Polymarket. The bet centered on a military operation involving the Venezuelan leader Nicolas Maduro.
These incidents provided the political momentum needed for a unanimous vote. While the Senate took action internally, Democratic lawmakers are simultaneously pressuring the Commodity Futures Trading Commission (CFTC) to implement broader industry-wide safeguards against insider trading.
The scope of this specific rule change is limited exclusively to the 100 members of the Senate. It does not currently apply to members of the House of Representatives, members of Congress, or executive branch officials.
Despite its narrow application, the decision marks a shift in how Washington views the intersection of decentralization and governance. As prediction markets become more liquid, the risk of “information leakage” from the corridors of power has become a major concern for regulators.
Industry leaders at Kalchi and Polymarket have already started execution self-imposed restrictions on political figures. However, proactively changing the Senate Rules establishes a formal ethical boundary that was previously a legal gray area.
The resolution includes a minor exception for traditional insurance contracts to ensure that standard financial planning is not affected. This adjustment was made following a suggestion from Senator Alex Padilla (D-CA) during the drafting process.
Violations of the new rule will now trigger immediate review by the Senate Ethics Committee. Although the ban is not statutory law, the unanimous consent reflects a rare moment of bipartisan agreement on the need for transparency in the digital age.
As the 2026 election cycle continues, attention now shifts to whether the House will follow suit. For now, the Senate has sent a clear message: The Capitol is no place for speculators looking to bet on the future of the country.
