The Brazilian Social Democracy Party (, PSDB), also known as the Brazilian Social Democratic Party or the Party of Brazilian Social Democracy, is a political party in Brazil. As the third largest party in the National Congress, the PSDB was the main opposition party against the Workers' Party (PT) administrations of Luiz Inácio Lula da Silva and Dilma Rousseff from 2003 to 2016. Born together as part of the social democratic opposition to the military dictatorship from the late 1970s through the 1980s, the PSDB and the PT have since the mid-1990s been the bitterest of rivals in current Brazilian politics—both parties prohibit any kind of coalition or official cooperation with each other at any government levels. The PSDB's mascot is a blue and yellow colored toucan, with party members being called tucanos for this reason. Famous tucanos include Mário Covas, Geraldo Alckmin, Tasso Jereissati, Aécio Neves, former President Fernando Henrique Cardoso, Franco Montoro, Aloysio Nunes, Yeda Crusius, João Doria, and José Serra. History With the imminent collapse of the military dictatorship in the early 1980s, a group of left-wing intellectuals were mobilized to create a leftist party. Some of them attempted to work with the labour movement led by Luiz Inacio Lula da Silva, but the group split over ideological grounds. A group of democratic socialists and Trotskyists joined the labour movement and founded the Workers' Party (PT) while the social democrats remained in the Brazilian Democratic Movement Party (PMDB) and would later create the Brazilian Social Democracy Party. Founded on 25 June 1988 by members of the Brazilian Democratic Movement Party (PMDB) linked to the European social democratic movement as an attempt to clarify their ideals, its manifesto preached "democracy as a fundamental value" and "social justice as an aim to be reached". In its foundation, the party attempted to unite political groups as diverse as social democrats, social liberals, Christian democrats and democratic socialists. The period when the PSDB was created was a very significant moment in the history of Brazilian politics. On 21 April 1985, President-elect Tancredo Neves died, having been the last President not elected directly by the people since the beginning of the military dictatorship. With the formation of new parties, including the PSDB, a National Constitutional Assembly was created and drafted the current democratic constitution in 1988. A high proportion of the first members of the PSDB came from the so-called "historic PMDB",