The Brazilian Revolution of 1930 marked the end of the First Brazilian Republic. President Washington Luís was deposed; the swearing-in of President-elect Julio Prestes was blocked, on the grounds that the election had been rigged by his supporters; the 1891 Constitution was abrogated, the National Congress was dissolved and the provisional military junta ceded power to Vargas. Federal intervention in state governments increased and the political landscape was altered by suppressing the traditional oligarchies of São Paulo and Minas Gerais states.