Franco also approached Valladares to propose the declaration of martial law and calling out of the army. This was not a coup attempt but more of a "police action" akin to Asturias, as Franco believed the post-election environment could become violent and was trying to quell the perceived leftist threat. Valladares resigned, even before a new government could be formed. However, the Popular Front, which had proved an effective election tool, did not translate into a Popular Front government. Largo Caballero and other elements of the political left were not prepared to work with the republicans, although they did agree to support much of the proposed reforms. Manuel Azaña Díaz was called upon to form a government, but would shortly replace Zamora as president. The right reacted as if radical communists had taken control, despite the new cabinet's moderate composition; they were shocked by the revolutionary masses taking to the streets and the release of prisoners. Convinced that the left was no longer willing to follow the rule of law and that its vision of Spain was under threat, the right abandoned the parliamentary option and began to conspire as to how to best overthrow the republic, rather than taking control of it.