Since 1989, PCdoB has been allied to the Workers' Party (PT) at the federal level, and, as such, it participated in the Luiz Inácio Lula da Silva administration and joined the "With the strength of the people" coalition, which elected his successor, Dilma Rousseff.
Sejak tahun 1989, PCdoB telah bersekutu dengan Partai Pekerja (PT) di tingkat federal, dan dengan demikian, berpartisipasi dalam pemerintahan Luiz Inácio Lula da Silva dan bergabung dengan koalisi "Dengan Kekuatan Rakyat", hingga masa pemerintahan Dilma Rousseff.