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SAO PAULO, BRAZIL - MARCH 13: Supporters of government of Dilma Rousseff protest to reject a possible impeachment against President Dilma Rousseff, scandal-hit oil company Petrobras, and demanded workers' rights and political reform in Sao Paulo, Brazil, on March 13, 2015. (Photo by Benjamin Tavener /Anadolu Agency/Getty Images)

SAO PAULO, BRAZIL - MARCH 13: Supporters of government of Dilma Rousseff protest to reject a possible impeachment against President Dilma Rousseff, scandal-hit oil company Petrobras, and demanded workers' rights and political reform in Sao Paulo, Brazil, on March 13, 2015. (Photo by Benjamin Tavener /Anadolu Agency/Getty Images)