During the early presidency of Gustavo Díaz Ordaz , Carlos A. Madrazo was appointed president of the party and undertook serious reforms in 1964-65 . PRI legislators were attempting to negate the principle of no-reelection for members of congress , which many of supported . Madrazo went further in reform attempts , seeking to democratize the electoral process for municipal candidates , which sectoral leaders and local PRI bossed opposed because it would undermine their hold on local elections . It was implemented in just seven states . Madrazo was forced to resign . Madrazo died in an airplane crash in 1969 , which at the time was considered suspicious
an airplane crash
Mexicana Flight 704
Institutional Revolutionary Party