The most important challenge from a state governor was by Venustiano Carranza, governor of Coahuila, who drafted the Plan of Guadalupe, calling for the creation of a Constitutionalist Army (evoking the 1857 Liberal Constitution) to oust the usurper Huerta and restore constitutional government. Supporters of Carranza's plan included Emiliano Zapata, who nonetheless remained loyal to his own Plan de Ayala; northern revolutionary Francisco "Pancho" Villa; and Álvaro Obregón. However, former revolutionary Gen. Pascual Orozco, whom Huerta fought when serving President Madero, now joined with Huerta as a counter-revolutionary. Four Deputies were executed over the summer of 1913 for criticizing the Huerta regime. One deputy was arrested by Mexico City police as he was delivering a speech denouncing Huerta at a rally and taken out to the countryside, where he was "shot while trying to escape". Lacking popular legitimacy, Huerta chose to turn the refusal of the US to recognize his government as an example of American "interference" in Mexico's internal affairs, organizing anti-American demonstrations in the summer of 1913 with the hope of gaining some popular support.