 Complete the following phrase:  When moderate liberal President Ignacio Comonfort was forced to resign by the Conservatives in 1858, Juárez, as head of the Supreme Court, assumed the presidency and the two governments competed. His succession was codified in the Constitution of 1857 but he survived in internal exile for a period during which he signed the McLane-Ocampo Treaty in 1859. He weathered the War of the Reform 18581860, a civil war between the Liberals and the Conservatives, and the 