While the crypto market burned through the early days of June 2026, a quieter but consequential fight was unfolding in Washington.
Summary
- The Senate has already banned senators and staff from trading on prediction markets.
- House lawmakers want to add prediction-market restrictions to a broader congressional stock-trading ban.
- Lawmakers can possess private information and directly influence the outcomes these markets price.
- Polymarket and Kalshi support the restrictions as a way to strengthen market credibility.
Congress is moving to ban its own members from betting on crypto prediction markets like Polymarket and Kalshi, the platforms that let users trade contracts on the outcomes of elections, policy decisions, and real-world events.
The Senate already did it: on April 30, 2026, senators unanimously passed a rule barring themselves and their staff from trading on prediction markets, effective immediately.
Now the House is preparing to follow, with Representative Bryan Steil working to attach prediction-market restrictions to a broader bill banning lawmakers from trading individual stocks, and a vote possible this summer.
The driving concern is stark and specific: members of Congress have access to non-public information that moves the very outcomes these markets price, from legislation to policy to national security, which makes their participation a form of insider trading hiding in plain sight.
The strangest part of the story is who supports the ban. Polymarket and Kalshi, the platforms that would lose these users, are publicly cheering it on.
This piece explains what is being proposed, why it is happening, the real cases driving it, and what it means for the prediction-market industry.
What is actually being proposed
The push is not a single bill but a cluster of overlapping efforts at different stages, and understanding the landscape requires separating what has already happened from what is still in motion.
The furthest-along action is already done. On April 30, 2026, the U.S. Senate unanimously passed a rule barring senators and their staff from trading on prediction markets like Kalshi and Polymarket, effective immediately.
Unanimous passage in a chamber as divided as the Senate is itself remarkable, signaling that concern about lawmakers betting on prediction markets crosses party lines completely.
The Senate move came amid rising worry about insider trading on these platforms and about event contracts that can involve sensitive outcomes, and it applied to senators and their offices right away instead of waiting on a lengthy implementation process.
The House is the current battleground. Representative Bryan Steil, who chairs the House Administration Committee, is working with Republican leadership to bring the House in line with the Senate.
His chosen vehicle is H.R. 7008, a bill that would prohibit members of Congress, their spouses, and their dependents from buying individual stocks, and that would require lawmakers to publicly disclose an intent to sell at least seven days before completing a transaction.
Steil’s plan is to attach prediction-market language to this stock-trading ban, extending the same logic, that lawmakers should not trade on markets their decisions can move, from stocks to prediction contracts.
The stock-trading bill was reported out of committee and placed on the House calendar, making it eligible for a floor vote that Steil expects could happen during the summer.
Violations would trigger penalties of either $2,000 or 10% of the investment’s value, whichever is larger.
Around these two main efforts sit several parallel proposals that show how broad the concern has become.
The PREDICT Act would bar the president, vice president, and all 535 members of Congress from prediction-market trading, a scope covering roughly 537 federal officials.
Representative Ritchie Torres introduced the Campaign Funds Integrity Act of 2026, which targets the use of campaign funds for prediction-market gambling with criminal penalties of up to five years imprisonment, enforced through the Federal Election Commission and referrals to the Department of Justice.
A separate bipartisan Senate bill from Senators Adam Schiff and John Curtis takes aim at a different target entirely, seeking to ban prediction markets from listing sports-betting and casino-style contracts.
The common thread is a Washington that has suddenly decided prediction markets need guardrails, with lawmaker participation as the most urgent piece.
Why this is happening now
Prediction markets have existed for years, so the obvious question is why the crackdown is arriving in 2026.
The answer is a combination of the markets’ explosive growth, their unique insider-trading problem, and a series of concrete incidents that made the abstract risk undeniable.
The growth is the backdrop. Prediction markets surged in prominence around the 2024 U.S. election, when Polymarket in particular drew attention for reflecting real-time political sentiment more accurately than some traditional polls, and the sector’s volume has since reached records.
As these markets grew from a niche curiosity into a multibillion-dollar arena where serious money rides on political and policy outcomes, the stakes of who is allowed to trade on them grew accordingly.
A market small enough to ignore became a market large enough to demand rules.
The insider-trading problem is what makes lawmakers specifically dangerous.
Prediction markets price the probability of future events, and a huge share of the most-traded contracts are about exactly the things members of Congress control or influence: whether a bill passes, what a policy decision will be, the outcome of a confirmation, or the direction of a regulatory action.
A lawmaker trading on these markets is, in many cases, betting on the outcome of their own work, with access to non-public information about what is likely to happen.
This is structurally worse than the stock-trading problem that the STOCK Act tried to address, because with prediction markets the lawmaker does not just have inside information about an event, they often have direct power over the event itself.
They can bet on an outcome and then vote to make it happen. That is not a hypothetical conflict of interest; it is a mechanism for converting political power directly into trading profit.
The concrete incidents turned the theoretical risk into a visible scandal.
Kalshi suspended and fined one U.S. Senate candidate and two House candidates for political insider trading on their own campaigns, betting on races where they had non-public knowledge of their own positions.
More dramatically, a U.S. Army Special Forces master sergeant was charged in an indictment accusing him of using classified information to make Polymarket bets related to the American military mission that captured Venezuelan leader Nicolás Maduro, a case that linked prediction-market betting directly to the misuse of national-security secrets.
These cases gave lawmakers and the public a tangible picture of the danger: people with privileged information, whether about their own campaigns or classified operations, turning that information into prediction-market profit.
Once the risk had names and indictments attached, the legislative response accelerated.
The twist: the platforms support the ban
The most counterintuitive element of the story is that Polymarket and Kalshi, the platforms that would lose these high-profile users, are not fighting the bans.
They are actively endorsing them, and understanding why reveals how the industry is thinking about its own future.
When the Senate passed its ban, both companies publicly cheered.
Polymarket said it was “in full support,” noting that its rulebook and terms of service already prohibited such conduct and calling codification into law “a step forward for the industry,” while offering to help move it forward.
Kalshi co-founder Tarek Mansour was equally enthusiastic, saying Kalshi already proactively blocks members of Congress and enforces against insider trading.
He called the Senate rule “a great step to increase trust in our markets by making it an industry standard,” before urging the House to follow.
These are not grudging acceptances. They are endorsements from the companies the legislation targets.
The strategic logic is clear once you think about what these platforms actually want.
Prediction markets are fighting for mainstream legitimacy and regulatory acceptance, trying to establish themselves as serious, trustworthy financial infrastructure, not gambling dens or vehicles for manipulation.
Their biggest existential threat is not losing a few hundred lawmaker accounts. It is being seen as rigged, as places where insiders profit at the expense of ordinary participants.
An insider-trading scandal involving a member of Congress would be far more damaging to the industry’s legitimacy than the loss of those members as customers.
By supporting the ban, the platforms get to position themselves as responsible actors who want clean markets, removing a source of scandal risk while earning goodwill with the regulators who hold their future in their hands.
There is also a competitive and verification angle.
The platforms already claim to block and enforce against this conduct, so a legal ban mostly codifies what they say they already do, costing them little while giving them a public-relations and regulatory win.
It lets them argue that prediction markets are self-aware about their risks and willing to accept guardrails, which strengthens their case in the larger, more consequential regulatory fights over whether and how prediction markets should be allowed to operate at all.
In effect, the platforms are trading a small, scandal-prone user segment for enhanced legitimacy, which is an easy trade when their central challenge is being taken seriously.
The lawmaker ban is the cheap, popular reform that buys credibility for the harder regulatory battles ahead.
How prediction markets actually work
To understand why lawmaker participation is so fraught, it helps to understand the mechanism these platforms use, because it is precisely that mechanism that turns inside information into a clean profit opportunity.
A prediction market is, at its core, a marketplace for contracts that pay out based on whether a specified event happens.
A contract on “Will this bill pass by year-end” might trade at 40 cents, reflecting a market-implied 40% probability, and it settles at $1 if the bill passes and zero if it does not.
Anyone who believes the true probability is higher than the market price can buy the contract and profit if they are right, and anyone who thinks it is lower can effectively bet against it.
The price of the contract becomes a real-time, money-backed estimate of the event’s likelihood, which is what makes these markets useful.
They aggregate the views of many participants, weighted by how much money each is willing to risk, into a single probability that often outperforms polls and pundits.
This is the legitimate appeal that has drawn serious interest, including the praise Polymarket received for tracking the 2024 election more accurately than traditional forecasting.
But that same mechanism is what makes inside information so valuable on these platforms.
In a normal financial market, having private information about a company is useful but indirect, because many factors move a stock price.
In a prediction market, the contract pays out based on a single, specific outcome, so private knowledge about that exact outcome translates almost perfectly into profit.
If you know with certainty that a bill will pass because you control the vote, a contract priced at 40 cents is a near-guaranteed 150% return, with none of the noise that complicates stock trading on inside information.
The directness is the problem.
Prediction markets convert specific knowledge about specific outcomes into specific payouts, and no one has more specific knowledge about legislative and policy outcomes than the legislators and officials who determine them.
This is why the lawmaker issue is structurally distinct from the stock-trading concerns the STOCK Act addressed.
A member of Congress trading stocks on inside information is exploiting an information advantage.
A member of Congress trading prediction markets on the outcome of their own legislation is exploiting both an information advantage and a control advantage, because they do not just know what will happen, they decide what will happen.
They can take a position and then act to make it pay off.
That combination, knowledge plus control plus a mechanism that pays out directly on the specific outcome, is what makes prediction-market participation by lawmakers uniquely indefensible.
It is also why the Senate’s ban was unanimous and the platforms themselves endorse the restriction.
The global and enforcement problem
Even if the lawmaker bans pass cleanly, two harder questions sit underneath them: how to enforce the rules, and how to handle the parts of the prediction-market world that operate outside U.S. reach.
Enforcement is hard, especially for the crypto-native platforms.
A centralized, regulated venue like Kalshi can identify its users through know-your-customer requirements and block or flag members of Congress, which is why Kalshi can credibly claim it already enforces against lawmaker trading.
But Polymarket operates on the Polygon blockchain as a more decentralized, crypto-native platform, and the pseudonymous nature of on-chain activity makes it far harder to verify who is actually behind a given wallet.
A lawmaker determined to evade a ban could, in principle, trade through a wallet not linked to their identity, and the platform might have no straightforward way to detect it.
This raises the uncomfortable question of whether the bans would force decentralized prediction-market protocols to implement identity verification, which would cut against the permissionless design that defines them.
Analysts judge it unlikely that the lawmaker-focused bills would target platforms directly, since their enforcement mechanism is aimed at the officials through congressional ethics rules and potential criminal penalties rather than at the venues.
However, the verification problem remains a real gap between a ban on paper and a ban in practice.
The global dimension compounds it.
Prediction markets operate across borders, and capital and contracts can flow through jurisdictions outside U.S. control.
Congress has been debating whether additional restrictions should apply to prediction markets operating outside the U.S., recognizing that a purely domestic rule can be circumvented by routing through offshore or decentralized venues.
This mirrors the broader challenge of regulating crypto generally: the technology is global and permissionless, while regulation is national and jurisdiction-bound.
Rules written for U.S.-regulated venues like Kalshi may simply push activity toward platforms and structures that are harder to reach.
The lawmaker bans are most enforceable precisely where they matter least, on the compliant, identity-verified platforms that already block such conduct, and least enforceable where determined evasion is easiest, on decentralized and offshore venues.
These enforcement and jurisdictional gaps do not undermine the case for the bans, which remain a clear integrity improvement, but they do temper expectations about what the bans can accomplish in practice.
A determined bad actor with inside information and technical sophistication may find ways around a rule that catches the casual or compliant.
The bans should therefore be understood as raising the barrier and setting a standard rather than as an airtight solution.
The real value may be as much normative as practical: codifying into law that lawmakers must not bet on the outcomes they control establishes a clear ethical line and a basis for prosecution, even if perfect enforcement remains elusive.
That is meaningful, but it is not the same as making the conduct impossible.
The gap between the two is where the harder, less settled parts of prediction-market regulation will continue to play out.
The bigger regulatory picture
The lawmaker bans are the most advanced piece of a much broader regulatory reckoning with prediction markets, and the lawmaker issue is in some ways the easy part of a far more complicated set of questions.
The harder questions concern the markets themselves rather than who trades on them.
Prediction markets occupy an awkward regulatory position: they use futures and commodity-contract mechanisms that fall under federal oversight by the Commodity Futures Trading Commission, which lets them offer event contracts nationwide, sidestepping the state-by-state regulation that governs traditional sports betting and gambling.
This has created tension on multiple fronts.
The Schiff-Curtis bill targets the sports-betting and casino-style contracts that critics argue are gambling dressed up as financial trading, exploiting the federal-oversight loophole to offer nationwide what would be tightly regulated if done through traditional channels.
Congress is also debating whether additional restrictions should apply to prediction markets operating outside the U.S., and how to handle decentralized, crypto-native platforms that are harder to regulate than centralized venues.
Polymarket’s own regulatory history illustrates the complexity.
The platform settled with the CFTC in 2022 and has been unavailable to U.S. users, operating on the Polygon blockchain as a crypto-native, decentralized-leaning venue, which raises questions a centralized exchange like Kalshi does not.
Kalshi operates as a CFTC-regulated designated contract market, fully inside the U.S. regulatory perimeter.
The two leading platforms therefore sit in different regulatory positions, and the various bills affect them differently.
A particularly thorny question is whether any of this legislation could force decentralized prediction-market protocols to implement identity verification.
However, analysts judge it unlikely that the lawmaker-focused bills would target platforms directly, since their enforcement mechanism is aimed at the officials rather than the venues.
The political timing adds pressure.
As with the CLARITY Act and other crypto legislation, the prediction-market bills are racing against a crowded congressional calendar and the approaching midterm elections, which shorten the window for action.
Steil expects a possible House vote on the stock-and-prediction-market bill this summer, but broader market-structure bills governing how prediction markets operate would fall under the House Agriculture or Financial Services Committees and could take much longer.
The likely near-term outcome is that the narrow, popular, bipartisan lawmaker ban advances while the harder questions about the markets’ fundamental legality and scope remain unresolved, pushed into a future session.
The lawmaker ban is the reform everyone can agree on. The structural questions are where the real fights will happen.
What it means
Pulling it together, the lawmaker prediction-market bans are significant both for what they directly do and for what they signal about the broader trajectory of prediction markets as an industry.
What they directly do is close an obvious and indefensible loophole.
Allowing members of Congress to bet on prediction markets pricing the outcomes of their own decisions was a conflict of interest so clear that it produced unanimous Senate action, a rarity in modern Washington.
The bans, where they pass, mean that the roughly 537 most powerful federal officials cannot convert their privileged access to non-public information and their direct power over outcomes into prediction-market profit.
That is a genuine integrity improvement, and the real insider-trading cases, the fined candidates and the charged Special Forces sergeant, show it addresses an actual problem, not a theoretical one.
What it signals is that prediction markets have arrived as a serious enough financial arena to warrant federal attention, which cuts both ways for the industry.
On one hand, regulation is a form of legitimization: markets that are being carefully regulated are markets that are being taken seriously, and the platforms’ eager support for the lawmaker bans reflects their understanding that accepting guardrails is the path to mainstream acceptance.
On the other hand, the lawmaker bans are the leading edge of a regulatory wave that includes much harder questions: about sports betting, the federal-oversight loophole, decentralized platforms, and whether these markets are financial instruments or gambling.
Those questions could constrain the industry far more than a ban on a few hundred officials ever would.
The easy reform is passing. The consequential ones are coming.
For anyone watching the prediction-market space, the practical takeaway is to distinguish the lawmaker bans from the broader regulatory fight.
The lawmaker bans are popular, bipartisan, supported by the platforms themselves, and likely to pass in some form, and they are good for the industry’s legitimacy.
The deeper questions, about what these markets can list, who can operate them, and how decentralized venues fit into the U.S. regulatory perimeter, are where the industry’s future will actually be decided.
Those fights are just beginning.
The image of Polymarket and Kalshi cheering on a ban of their own most prominent users captures the moment perfectly: an industry trading short-term customers for long-term legitimacy, betting that accepting regulation now is the price of survival later.
Whether that bet pays off depends not on the lawmaker bans, which are nearly settled, but on the harder battles over the markets themselves, which are only starting.
Congress wanting to ban lawmakers from prediction markets is the easy, obvious first move in a much longer game.
This article is for informational purposes and does not constitute financial, investment, or legal advice. The figures and analysis described reflect data available as of June 2026. Always do your own research and consult with qualified professionals before making decisions.
