Dilma Rousseff run for president. She was elected in a run-off on 31 October 2010, beating Brazilian Social Democracy Party (PSDB) candidate José Serra. On 26 October 2014 she won a narrow second-round victory over Aécio Neves, also of the PSDB. Impeachment proceedings against Rousseff began in the Chamber of Deputies on 3 December 2015. On 12 May 2016, the Senate of Brazil suspended President Rousseff's powers and duties for up to six months or until the Senate decided whether to remove her from office or to acquit her. Vice President Michel Temer assumed her powers and duties as Acting President of
Workers' Party (Brazil) His successor Dilma Rousseff, also a member of PT, took office on 1 January 2011. Both born from the opposition to the coup d'état of 1964 and the subsequent military dictatorship, PT and the Brazilian Social Democracy Party (PSDB) from 1994 to 2014 were the biggest adversaries in contemporary Brazilian politics, with their candidates finishing either first or second on the ballot on the last six presidential elections. Both parties generally prohibit any kind of coalition or official cooperation with each other. Despite its large number of supporters, the party has been involved in a number of corruption scandals since