States ask Supreme Court to revisit Horseracing Integrity law challenge

The latest Supreme Court bid keeps horse racing’s biggest regulatory fight alive at the exact moment HISA is trying to sell the sport on one hard number: 0.95 racing-related fatalities per 1,000 starts in the first quarter of 2026. That is the backdrop as Oklahoma, West Virginia and Louisiana, joined by their racing commissions and a cluster of track and horsemen interests, asked the justices once more to revisit the constitutionality of the Horseracing Integrity and Safety Act.

The petition, filed May 15 and docketed June 2 as No. 25-1325, comes from the State of Oklahoma, the Oklahoma Horse Racing Commission, the Tulsa County Public Facilities Authority doing business as Fair Meadows Racing and Sports Bar, the State of West Virginia, the West Virginia Racing Commission, Hanover Shoe Farms, the Oklahoma Quarter Horse Racing Association, Global Gaming RP doing business as Remington Park, Will Rogers Downs, the United States Trotting Association and the State of Louisiana. That roster tells you how broad the fight has become: this is no longer just a state-federal dispute, but a direct challenge from the people and entities who have to live under the rules.

The legal path has already run through the federal courts more than once. The Fifth Circuit said on July 5, 2024 that Congress empowered a private corporation, the Horseracing Integrity and Safety Authority, to create and enforce nationwide rules for Thoroughbred racing, though it drew a line between the statute’s rulemaking structure and its enforcement provisions. The Sixth Circuit then upheld HISA again on Dec. 17, 2025 after the Supreme Court sent earlier cases back on June 30, 2025 for another look in light of FCC v. Consumers’ Research. The Eighth Circuit has also weighed in on related constitutional arguments, leaving the issue splintered but very much alive.

What happens now is simple in theory and messy in practice. HISA stays in force while the court fight continues, and trainers, horsemen and track operators keep working inside a national system that covers Racetrack Safety, anti-doping and controlled medication, the Prohibited List, Testing and Investigation, Laboratories and Accreditation, Arbitration Procedures, Enforcement Rules, Assessments and Registration. The Federal Trade Commission already approved a Racetrack Safety Rule modification on June 7, 2024, effective July 8, 2024, and HISA says it remains fully operational as the litigation drags on.

That operational reality matters on the ground. Every time the law is challenged, the sport gets another reminder that the rules governing medication, safety and enforcement still sit on contested constitutional footing. For bettors, the payoff is less dramatic but just as real: the product is shaped by whether tracks can trust the same framework from Lexington to Cincinnati to Washington, D.C., or whether another round at the Supreme Court changes the map again.