sentences:  The lack of the appearance of democracy in the national elections undermined the legitimacy of the system.He proposed a reform called "Ley Federal de Organizaciones Políticas y Procesos Electorales" which gave official registry to opposition groups such as the Mexican Democratic Party and the Mexican Communist Party.This law also created positions in the lower chamber of congress for opposition parties through proportionality of votes, relative majority, uninominal and plurinominal.