PT (Partido dos Trabalhadores): The Workers' Party, a prominent left-wing political party in Brazil that has played a crucial role in the country's recent political landscape, particularly during the presidencies of Luiz Inรกcio Lula da Silva and Dilma Rousseff.
Coalition Government: A political arrangement in which multiple political parties come together to form a government, often seen in Brazil due to its fragmented party system and the necessity of building alliances to achieve a governing majority.
Electoral System: Brazil uses a proportional representation electoral system that encourages the participation of multiple parties and is characterized by its complex voting procedures, including the use of open lists.