Antônio Pedro de Siqueira Indio da Costa on June 30, 2010, was chosen as the running mate to Presidential candidate José Serra. - in what was seem as a move pressed on Serra by the DEM leadership, as Serra tended to favour a "pure-blooded" PSDB ticket As vice-presidential candidate, he made himself noticed mostly by his declarations accusing the Workers' Party of connections with the FARC and international drug dealing, something that earned him the nickname of "Serra['s] Palin". After the results of the 2010 election, which by the popular vote elected Dilma Rousseff as Brazil's first female president, Indio da Costa parted from his former political
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