Quadros resigned in 1961, the same year of his inauguration, in a clumsy political maneuver to increase his popularity. According to the constitution then in force, enacted in 1946, Goulart should have automatically replaced Quadros as president, but he was on a diplomatic trip to the People's Republic of China. A moderate nationalist, Goulart was accused of being a communist by right-wing militants, and was unable to take office. After a long negotiation, led mainly by Jango's brother-in-law Leonel Brizola, then governor of Rio Grande do Sul, Goulart's supporters and the right-wing reached an agreement under which the parliamentary system would replace the presidential system in the country, where Goulart would be named head of state.