Venustiano Carranza wanted that a civilian instead of military be elected as president of Mexico. Carranza supported the candidacy of Bonillas in the election of 1925, even if he was not very well-known in Mexico. Álvaro Obregón, a general who was popular, opposed and launched the Plan of Agua Prieta.
However when Carranza's autocratic rule was threatened, the threat would come from the Constitutionalist army he set up.
Carranza was assassinated after he tried to have Obregon arrested on false charges (Obregón was put up for election for president, which threatened Carranza and his choice of successor, IgnacioBonillas) and Obregón marched on Mexico City with his army.
Carranza, fearful of the able and ambitious Obregón, had chosen a man named IgnacioBonillas to succeed him.
Bonillas, formerly Mexican ambassador to Washington, had spent so much of his life outside Mexico that political enemies claimed he had difficulty speaking Spanish.
They called him "Meester" Bonillas and on one occasion derailed his campaign train, causing him to miss an engagement.