Senate Democrats want prediction markets dragged into the open
Prediction markets are drawing real money, real users, and now real Senate scrutiny. Eleven Senate Democrats are pushing Senate Banking Committee Chair Tim Scott to hold a public hearing on platforms like Kalshi and Polymarket, with concerns growing over consumer risk, manipulation, and whether some contracts belong under SEC rules instead of sitting in a regulatory gray zone.
- 11 Senate Democrats want a public hearing
- Kalshi and Polymarket are drawing serious volume and scrutiny
- Regulators are worried about manipulation, losses, and legal overlap
- Sports contracts remain the ugliest fight
The request came in a Sep. 23 letter led by Sen. Elizabeth Warren and Sen. Catherine Cortez Masto. The lawmakers asked Tim Scott to bring the full Senate Banking Committee into public session instead of leaving the issue to private meetings and hallway diplomacy.
That timing matters. According to The Block, Republican committee members met privately with Kalshi CEO Tarek Mansour on the same day. Scott said the discussion covered “securities-linked products, how investors use them, retail protections, and regulatory questions for Congress.”
In plain English, this is no longer a niche crypto-adjacent curiosity. It is a turf war over what prediction markets are, who gets to police them, and how much risk the public should be allowed to eat.
The Democrats said the full committee has “a critical oversight role to play, ” and they are not wrong. Prediction markets sit at the intersection of finance, betting, politics, and crypto culture. That mix is catnip for traders and a migraine for regulators.
At the core of the fight is a simple question with a very messy answer: what are these contracts, legally speaking?
Prediction markets let users trade on the outcome of real-world events. A contract on an election, a sports game, or a corporate result might look like a bet, a derivative, or something in between depending on how it is structured. The Democrats argue some contracts tied to corporate performance could qualify as security-based swaps, which would push them toward SEC oversight.
That is not a settled conclusion. It is a legal argument, and a big one. The line between a regulated financial product and a very expensive loophole is not always as thick as market promoters like to pretend.
The CFTC has already shown it is not thrilled with contracts that hinge on what a named person says, attends, or does. The agency has warned that those products are especially exposed to manipulation, and it has brought cases that underline the risk. One involved a former White House teleprompter operator trading on advance access to presidential speeches. Another involved former Rep. George Santos trading on a contract tied to his attendance at the 2026 State of the Union.
That is the kind of thing that turns “market integrity” from policy jargon into a very obvious problem. If someone has nonpublic information or can influence an outcome in a tiny but meaningful way, the market starts looking less like price discovery and more like a rigged game with a fintech sheen.
The Democrats want the committee to examine consumer exposure, market integrity, and the financial products being offered. That is not empty language. Retail protections matter when ordinary users are stepping into markets where better-informed traders, insiders, or just much sharper operators can eat them alive.
For a broader regulatory primer, the CFTC’s explanation of prediction markets and event contracts lays out how these products are supposed to work when they are not being used as legal catnip for lobbyists and opportunists.
Volume is rising, but volume is not the same as victory
Prediction markets are getting bigger, and the headline numbers help explain why Washington is paying attention.
According to Pew Research Center, combined monthly trading volume for Kalshi and Polymarket had reached nearly $24 billion in April 2026. Pew also said that monthly volume rose from less than $5 billion in September 2025 to about $24 billion in April 2026, before staying around $26 billion in May in its later reporting.
That is a big jump. But “volume” is one of those numbers that gets abused constantly because most people do not stop to ask what it actually measures.
Pew says its figure counts contracts at their $1 value if the outcome is correct, not the price a trader paid to get in. So if someone buys a contract for 40 cents and it pays out at $1, Pew counts the full $1 value in its volume measure. That makes the number useful, but it is not the same thing as dollars wagered or profits earned.
That distinction matters. Otherwise, people start waving around giant figures like they prove broad adoption, healthy user economics, or deep market quality. They do not. They prove activity. Activity is not the same thing as wisdom.
Pew’s user data is more sobering than the hype crowd would like. In its analysis of 11, 989 active Polymarket wallets, the typical account was close to breaking even over a six-week period. The median user made 46 trades across 10 active trading days, while the average trade was about $6.50.
Pew also found that the average trader spent a little over $600 and lost less than $2 overall. That means most users were not wildly rich or catastrophically ruined. They were mostly just hovering around flat, which is a lot less glamorous than the “everyone is getting paid” fantasy some market boosters seem to love.
The distribution was uneven, though. Pew found that 56% of sampled accounts lost money, 7% made more than $1, 000, and 9% lost more than $1, 000. In other words, a small group did very well, a meaningful group got clipped, and the rest mostly milled around the middle.
That is the real story behind a lot of financial innovation: a few people win big, plenty of people lose small, and a surprising number confuse motion with edge.
The typical user profile from Pew Research Center’s breakdown of Polymarket users makes the point even harder to dodge: the market is busy, but busy does not automatically mean healthy.
Sports contracts are where the wheels come off
If regulators are looking for the easiest place to attack prediction markets, sports contracts are it.
Sports outcomes are already the domain of state gambling laws, licensed betting operators, and a very mature industry built around clear wagering rules. Prediction markets offering contracts on games create an immediate clash: are these financial instruments, or are they betting products with better branding?
That clash is why New Jersey asked the Supreme Court in September to review a ruling favoring Kalshi over sports contracts. The legal fight is still unresolved, which means the line between derivatives regulation and gambling enforcement remains about as neat as a trashed sportsbook floor after a blown parlay.
Kalshi is also trying to move beyond event contracts into more traditional market territory. In September, the company filed rules for stock and ETF perpetual futures, proposing 23-hour weekday trading and a minimum customer margin of 15.50%. The CFTC had not approved those submissions at the time referenced.
Separately, Kalshi’s Sep. 22 filing would allow eligible participants to post margin on selected event contracts. Margin is collateral, not free money: traders put up funds to cover potential losses instead of paying the full exposure upfront.
Under that proposal, sports contracts are excluded. Access would be limited to participants trading through a registered futures commission merchant or to those approved to clear their own trades.
That exclusion is telling. Sports is the political minefield, the state-law trap, and the easiest category for critics to frame as gambling with a spreadsheet attached. If prediction markets want legitimacy, that is the messiest place to start.
For a sharper look at the broader policy clash, see the CFTC prediction market clash over Kalshi and Polymarket, where state regulators and federal overseers are still fighting over who gets the steering wheel.
Why Congress cares now
The Democrats’ hearing request is about more than transparency. Public hearings create a record, force lawmakers to say where they stand, and make it harder for companies to get treated like a harmless novelty while they scale into something much larger.
Private meetings can be useful, but they also tend to favor whoever already has access. A public hearing would drag the arguments into the open: what these contracts are, who they serve, how they can be manipulated, and whether retail users are being sold a product they do not fully understand.
That is especially important in a market where the rules are still unsettled. The CFTC has jurisdiction over some event contracts. The SEC could have a role if certain products are treated as securities-linked instruments. States still care deeply about anything that smells like gambling, especially when sports are involved.
So yes, prediction markets can serve a real function. They can surface expectations, price uncertainty, and give users a way to trade on outcomes that old-school markets ignore. But useful does not mean exempt from scrutiny, and innovative does not mean immune to abuse.
If anything, the more these platforms resemble financial products, the less patience regulators will have for blurry design, insider-style advantages, or the usual crypto-era nonsense dressed up as disruption. The upside is real. So is the potential for someone to get cleaned out while thinking they found a shortcut to truth.
The political backdrop is also getting louder. For a wider view of how Washington is reacting, Trump’s backing of prediction markets has already put the issue into a broader fight between the CFTC and the states.
And yes, the dispute is now big enough that even the Senate is getting dragged into it, with 11 Senate Democrats calling for hearings on prediction markets instead of letting the issue linger in the usual swamp of private handshakes and regulatory fog.
For context on how this mess started escalating in the first place, the CFTC’s clash with states over Kalshi and Polymarket shows just how ugly the legal crossfire has become.
And if you want the plain-English, non-lobbyist version of the category itself, a prediction market is still, at its core, a place where people trade contracts tied to future outcomes, which sounds clean until humans, regulation, and money show up to ruin the simplicity.
For a look at why broader elections may become the next pressure point, 2026's elections could test how skyrocketing trading on prediction markets affects races and results is worth keeping on the radar.
Key questions and takeaways
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Why are Senate Democrats pushing for a hearing?
They want the full Senate Banking Committee to examine consumer risk, market integrity, and whether some prediction-market contracts should fall under SEC oversight. -
Why does the Kalshi meeting matter?
Republicans reportedly met privately with Kalshi’s CEO on the same day Democrats made their public-hearing request, which sharpens the fight over transparency and access. -
Are prediction markets really growing that fast?
Yes. Pew says combined monthly volume for Kalshi and Polymarket reached nearly $24 billion in April 2026, up sharply from less than $5 billion in September 2025. -
Are users actually making money?
Mostly not. Pew’s Polymarket wallet study found the typical account was close to break-even, while a small share of users made or lost more than $1, 000. -
What is the main regulatory fight?
It is a jurisdiction battle over whether these contracts are derivatives, security-based swaps, gambling products, or some mix of all three. -
Why are sports contracts such a flashpoint?
Sports contracts collide with state gambling laws and are easier for critics to treat as betting rather than financial hedging, which makes them the most politically explosive category.
Prediction markets have moved from niche experiment to serious policy fight. The money is real, the user activity is real, and the regulatory uncertainty is still a mess. That is exactly the kind of setup that gets Congress, the CFTC, and maybe even the SEC reaching for the same set of knives.
