After a series of false starts, the Horseracing Integrity and Safety Act's (HISA) signature anti-doping and medication control (ADMC) program is now set to go into effect on May 22. Continuing to play out against this latest development are a handful of lawsuits seeking to derail the law—a complex legal landscape evolving at seemingly vertigo-inducing speed. In a ruling delivered last week, judge James Hendrix of the Lubbock Division of the Northern District of Texas found the version of the act amended by Congress at the end of last year...