Workers' Party (Brazil) the centre-right opposition bloc as it shrank from 133 to 111 deputies. The left-wing opposition, formed by PSOL, retained control of three seats. The party was also expected to elect its presidential candidate Dilma Rousseff in the first round. However, she was not able to receive the necessary amount of valid votes (over 50%) and a second round in which she scored 56% of the votes took place on 31 October 2010. On 1 January 2011, she was inaugurated and thus became the first female head of government ever in the history of Brazil and the first "de facto" female
Maria do Rosário from 2011 to 2020. In 2004 Maria do Rosário was an unsuccessful candidate for deputy mayor on the ticket headed by fellow party member Raul Pont. In 2008 she was a mayoral candidate, losing to incumbent mayor José Fogaça. She was the Workers' Party's vice-president from 2005 to 2007. She was re-elected for a third term in 2010, after resolving legal issues relating to her 2008 campaign. On 8 December 2010 President-elect Dilma Rousseff appointed Maria do Rosário to succeed Paulo Vannuchi as head of the Secretariat of the Presidency of the Republic for Human Rights, a ministerial-level cabinet office.