However, the last straw may have been the controversial elections of 1988. That year, the presidency was set between the P.R.I.'s candidate, Carlos Salinas de Gortari, and a coalition of left-wing parties led by Cuauhtémoc Cárdenas, son of the former president Lázaro Cárdenas. The counting system "fell" because coincidentally the power went out and suddenly, when it returned, the winning candidate was Salinas, even though Cárdenas had the upper hand.
However the last straw may have been the controversial elections of 1988 That year the presidency was set between the PRI's candidate Carlos Salinas de Gortari and a coalition of left-wing parties led by Cuauhtémoc Cárdenas son of the former president Lázaro Cárdenas The counting system "fell" because coincidentally the power went out and suddenly when it returned the winning candidate was Salinas even though Cárdenas had the upper hand