The chairman of horse racing’s future governing body says the failed drug test of Kentucky Derby winner Medina Spirit shows the need for a uniform set of rules and penalties in place of the sport’s current patchwork system. In his first public comments since being appointed chairman of the Horseracing Integrity and Safety Authority’s board, Charlie Scheeler said Wednesday that Medina Spirit’s case is instructive for how the sport should be run going forward. The HISA takes effect in July 2022. Scheeler says making racing a safe, clean and fair sport is “quite a steep climb.”