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
Dilma Rousseff election was also a cause of friction among the two parties. They ended up launching each own a different candidate; PDT's was Collares and PT's was Tarso Genro. Rousseff defended the maintenance of the alliance which had elected Dutra, supporting Genro's candidacy, and claiming she would not accept "neoliberal alliances with the right-wing". Her critics said that she was being hypocritical, once she defended an alliance with Marchezan in the 1986 election. Genro defeated Collares in the second round and Rousseff, among other fellow PDT members, joined the Workers' Party. Brizola accused them of being traitors. During Rousseff's management of