Presidential debate planners eyeing 3 Valley venues  Organizers of Arizona’s Dec. 1 GOP presidential debate are primarily looking at three possible venues. The venues under consideration are the Mesa Arts Center, the Phoenix Convention Center and Gammage Auditorium, according to Republican National Committeeman Bruce Ash. Besides Gammage Auditorium, the organizers are open to considering other venues on Arizona State University’s campus in Tempe, Ash ...