The new liberal Constitution of 1857 was promulgated and the new president, Ignacio Comonfort, appointed Juárez as Minister of Government in November 1857. He was elected as President of the Supreme Court of Justice, an office that virtually put its holder as the successor to the President of the Republic. Conservatives led by General Félix María Zuloaga, with the backing of the military and the clergy and under the slogan "Religión y Fueros" (Religion and Privileges), launched a revolt under the Plan of Tacubaya on 17 December 1857. Comonfort sought to placate the conservative rebels by appointing several conservatives to the Cabinet, dissolving the Congress, and implementing most of the Plan of Tacubaya. Juárez, Ignacio Olvera, and many other liberal deputies and ministers were arrested. The actions did not go far enough for the rebels, and on 11 January 1858, Zuloaga demanded Comonfort's resignation. Comonfort re-established the Congress, and liberated all prisoners, before resigning as president. The conservative forces proclaimed Zuloaga as president on 21 January.