The Supreme Court of the United States Monday officially intervened in the 3 1/2-year legal odyssey in which the National Horsemen's Benevolent and Protective Association (NHBPA) and 12 of its affiliates are trying to wipe out the Horseracing and Safety Integrity Act (HISA) as an allegedly unconstitutional law. That intervention took the form of a Sept. 23 Supreme Court order signed by Justice Samuel Alito, Jr. directing the U.S. Court of Appeals for the Fifth Circuit not to issue its pending mandate stemming from a recent Fifth Circuit opinion that...