Post-election reform push could reshape Kalshi, Polymarket, and sports event contracts
The 2026 midterm results may trigger broad reform of prediction markets, with scrutiny aimed at sports contracts on Kalshi and both Polymarket venues. Trading data shows prediction markets hit record September volume driven by combo, sports, and crypto contracts, even as political trading faded. Kalshi held 73 percent market share through August and September as regulatory pressure on sports offerings intensified. The reform debate centers on whether sports-linked event contracts belong under federal derivatives rules or state gambling frameworks.
A post-election reform push would land on platforms already fighting scattered state litigation without a unified federal shield. Kalshi's federal preemption argument has already failed in Ohio and Tennessee, and Louisiana's attorney general just sued five operators including Kalshi and Polymarket. Every state court loss becomes template law the next attorney general copies, pulling legal resources away from product development.
The CFTC's twin swap-rule proposal could strengthen preemption, but rulemaking stretches across months while state courts move in weeks. Sports contracts drove September's record volume, so any reform targeting that category would cut directly into the revenue line that platforms have just proven can scale. Robinhood's $173 million quarterly prediction-markets revenue shows how deeply mainstream brokerages are now exposed to that same sports-contract risk.
The reform threat joins a running pattern of state enforcement that already spans Missouri, Arkansas, Kentucky, Ohio, Tennessee, Louisiana, and Utah, with Kalshi's co-founders facing felony arraignment in Utah on December 4 and the CFTC's swap-rule proposal still months from completion.