The Workers' Party (Portuguese: Partido dos Trabalhadores, PT) is a political party in Brazil. Launched in 1980, it is one of the largest movements of Latin America. It governed at the federal level in a coalition government with several other parties from January 1, 2003 until August 2016. After the 2002 parliamentary election, PT became the largest party in the Chamber of Deputies and the largest in the Federal Senate for the first time ever. Lula, the President with the highest approval rating in the history of the country, is PT's most prominent member. His successor, Dilma Rousseff, is also a member of PT; she took office on January 1, 2011. The party's symbols are the red flag with a white star in the center; the five-pointed red star, inscribed with the initials "PT" in the center; and the Workers Party's anthem. Workers' Party's TSE (Supreme Electoral Court) Identification Number is 13.
Both born from the opposition to the coup d'état of 1964 and the subsequent military dictatorship, Workers' Party (PT) and the Brazilian Social Democracy Party (PSDB) are since the mid-1990s 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.