On 22 October 1969 , Díaz Ordaz summoned Alfonso Martínez Domínguez — the PRI party president — and other party leaders to his office in Los Pinos to reveal Echeverría as his successor . Martínez Domínguez asked the president if he was sure of his decision and Díaz Ordaz replied , " Why do you ask ? It 's the most important decision of my life and I 've thought it over well . " On 8 November 1969 , Díaz Ordaz officially announced Echeverría as the presidential candidate . At one point during his campaign for the presidency , Echeverría called for a moment of silence to remember the victims of the Tlatelolco massacre , an act that enraged President Díaz Ordaz and almost prompted him to call for Echeverría 's resignation . Although Echeverría was a hardliner in Díaz Ordaz 's administration and considered responsible for the Tlatelolco massascre , he became " immediately obsessed with making people forget that he had ever done it . " Echeverría was the first president born after the Mexican Revolution . Once Echeverría inaugurated as president , he embarked on a massive program of populist political and economic reform , nationalizing the mining and electrical industries , redistributing private land in the states of Sinaloa and Sonora to peasants , imposing limits on foreign investment , and extending Mexico 's patrimonial waters to . State spending on health , housing construction , education , and food subsidies was also significantly increased , and the percentage of the population covered by the social security system was doubled . He enraged the left because he did not bring the perpetrators of the 1971 Corpus Christi massacre to justice
Corpus Christi massacre
Corpus Christi massacre
Luis Echeverría