The Supreme Court is allowing national medication and anti-doping rules for horse racing to remain in effect while a court fight likely to wind up with the justices continues.
The court on Monday kept on hold a ruling by the 5th U.S. Circuit Court of Appeals that found Congress gave too much power to the Horseracing Integrity and Safety Authority, the private entity that administers the rules.
Other appellate courts have rejected similar challenges and the justices are likely to step in to resolve the conflicting rulings.
The authority, backed by the Biden administration, Senate Republican leader Mitch McConnell of Kentucky and others, sought an emergency order from the Supreme Court.
Texas, as well as racetracks in the state and in neighboring Louisiana, opposed the emergency appeal.
