Landsman pushes ban on Supreme Court prediction market and stock trading
U.S. Rep. Greg Landsman, D-Ohio, has asked Chief Justice John Roberts to ban Supreme Court justices and staff from participating in prediction markets. The request extends a broader legislative push in Congress to restrict both stock trading and prediction market participation by federal officials. Landsman's proposal targets traditional securities trading alongside event-contract markets. The measure comes amid wider scrutiny of financial conflicts among senior government officials.
If Chief Justice Roberts acts, Kalshi and Polymarket lose a high-visibility user segment that signals mainstream institutional acceptance. The House Democrats' parallel judicial ban request already framed prediction markets as ethically corrosive to public trust. A Roberts endorsement would amplify that framing beyond partisan politics into the judiciary's own ethical canon. For platforms, each new restriction normalizes the next: they now face pressure from Congress, state attorneys general, municipal governments, and federal agencies simultaneously.
The Supreme Court angle is particularly damaging because it invites moderate regulators and independent voters to view event contracts as inherently suspect. Kalshi and Polymarket have relied on credible professional participation to counter the gambling caricature; losing the judiciary as allowed traders hands opponents a ready talking point that even the nation's top judges see these markets as unfit. The cumulative effect turns CFTC registration from a shield into a floor that satisfies no one.