By Mike MacAdam/The Leader-Herald SARATOGA SPRINGS — Organizers announced on Tuesday an effort to unionize the backstretch workers at New York Racing Association tracks, including Saratoga Race Course. Claiming that the hundreds of hot walkers and grooms who care for the racehorses on a daily basis need representation to ensure that the workers are paid properly, receive medical care and are housed in clean, safe living conditions, union organizer Gilberto Mendoza said he has gathered 675 signatures on a petition to unionize. He represents the International Brotherhood of Electrical Workers (IBEW) Local 1430, and has contacted NYRA and the New…