GOP bill targets Congress prediction market trading

TLDR

A new Republican bill would ban members of Congress and their families from betting on political outcomes on prediction markets like Kalshi and Polymarket.

1. The Stop Lawmakers from Predicting Act targets wagers by House members, spouses, and children on elections and policy outcomes, with fines and profit forfeiture for violations.
2. The bill responds to insider trading concerns and growing volumes on platforms such as Kalshi and Polymarket, but leaves retail users and sports bets largely untouched.
3. Its progress, plus state lawsuits and CFTC rulemaking, will shape how prediction markets fit into the broader crypto and derivatives landscape in the United States.

Deep Dive

1. What The Bill Actually Does

Rep. Bryan Steil (R?Wis.) introduced the Stop Lawmakers from Predicting Act, which would bar House members, their spouses, and dependent children from wagering on political and policy outcomes via prediction markets such as Kalshi and Polymarket. Reports say the ban is narrowly drafted to cover contracts tied to elections, legislation, government actions, or other policy events, while still allowing bets on unrelated topics like sports or entertainment.[^1]

Violators would owe at least 2,000 dollars or 10 percent of the trade value, whichever is higher, and must forfeit net profits, with fines explicitly barred from being paid using office or campaign funds.[^1][^2] The measure has backing from House Speaker Mike Johnson and President Donald Trump, and mirrors a Senate rule already barring senators and staff from similar bets.[^1][^3]

2. Why It Matters For Prediction Markets And Crypto

Prediction markets have surged in size, with Kalshi and Polymarket clearing billions of dollars in monthly volume, which has pulled them into the center of US policy debates.[^4] Lawmakers and gaming groups argue that members of Congress betting on outcomes they may influence is akin to insider trading, similar to the long running fight over stock trading by officials.[^1][^2]

At the same time, the bill signals that Washington is trying to carve out an ethics framework, not kill prediction markets outright. Other efforts, like the Prediction Markets Are Gambling Act and lobbying to amend the CLARITY crypto bill to ban sports event contracts, go further by attacking specific product lines rather than just insider participation.[^5][^6]

3. What To Watch Next

The House bill still needs committee markup, floor votes, and alignment with existing Senate rules before becoming law, so its language and scope could change. Parallel battles include Kentucky and other states suing Kalshi and Polymarket as alleged unlicensed sportsbooks, while the CFTC is asserting exclusive federal jurisdiction and drafting new rules to define which contracts are permissible.[^4][^7]

If Congress confines restrictions to public officials, prediction markets may gain a clearer compliance path. If broader bans on political or sports contracts advance, platforms may have to shift product focus, tighten geofencing, or lean more on non US growth.

Conclusion

A GOP backed bill aims to stop members of Congress and their families from betting on political outcomes, framing prediction market use by insiders as an ethics and trust problem rather than a retail access issue. Its fate, alongside state lawsuits and CFTC rulemaking, will help decide whether prediction markets in the United States mature into a regulated niche of the crypto and derivatives world or face tighter product bans and fragmented access.

[^1]: Bitcoin.com summary of the Stop Lawmakers from Predicting Act [^2]: TradingView overview of penalties and scope [^3]: Decrypt coverage on the House insider trading bill [^4]: CoinsKid analysis of Kalshi and Polymarket growth and scrutiny [^5]: Coverage of the Prediction Markets Are Gambling Act [^6]: Gaming industry push to amend the CLARITY crypto bill [^7]: Coindesk on Kentucky and multi state actions vs prediction markets