Mayor Carlos Gimenez, (left) debates his chief rival, Commission Chairman Joe Martinez, (right) at the Biltmore Hotel in Coral Gables, Friday, July 20, 2012. Peter Andrew Bosch / Miami Herald Staff

Mayor Carlos Gimenez, (center) debates his chief rival, Commission Chairman Joe Martinez, at the Biltmore Hotel in Coral Gables, Friday, July 20, 2012. Peter Andrew Bosch / Miami Herald Staff

Commission Chairman Joe Martinez, (center) debates with Mayor Carlos Gimenez, at the Biltmore Hotel in Coral Gables, Friday, July 20, 2012. Peter Andrew Bosch / Miami Herald Staff

Commission Chairman Joe Martinez (right) debates with Mayor Carlos Gimenez (left) at the Biltmore Hotel in Coral Gables, Friday, July 20, 2012. Peter Andrew Bosch / Miami Herald Staff