Political Structure

Brazil is a federal presidential republic governed under its 1988 Constitution, with executive, legislative, and judicial branches. The president leads the government, while lawmaking authority rests with a National Congress composed of many parties.

Though presidential politics looks binary in the media, the legislature remains multiparty, and the president must pursue “coalition building” to govern. Brazil’s federal structure, including 26 states and a Federal District, grants autonomy at state and local levels. The judiciary helps enforce constitutional order and resolve disputes.^1–4

Brazil’s political system is rooted in the 1988 Constitution, drafted after the end of military rule to prevent the re-concentration of power. Often referred to as the “Citizen Constitution,” it established strong checks and balances, expanded civil and social rights, and reinforced democratic institutions. Executive authority is vested in the president, elected by popular vote for a four-year term, who acts as both head of state and head of government.¹

Legislative power lies with the bicameral National Congress, composed of the Chamber of Deputies—elected through proportional representation—and the Federal Senate, which represents the states. Brazil’s party system is highly fragmented, with dozens of parties regularly holding seats in Congress.² No single party typically commands a majority, making coalition-building a structural necessity rather than a political choice.

This arrangement gives rise to coalitional presidentialism, the defining mechanism of Brazilian governance. To pass legislation, presidents must negotiate support across ideologically diverse parties, often through cabinet appointments, budgetary control, and policy concessions. A key actor in this process is the Centrão, a loose bloc of pragmatic parties that frequently holds the balance of power. While this system enables governability, it also raises transaction costs, increases vulnerability to political bargaining, and can slow or dilute policy implementation.³

Brazil’s federal design adds further complexity. The country is composed of 26 states and the Federal District, each with elected governors, legislatures, and constitutional authority. States and municipalities collect a significant share of taxes and are responsible for delivering many public services, making coordination across levels of government central to effective policymaking.¹

The judiciary—led by the Supreme Federal Court (STF)—has become an increasingly influential political actor. Through constitutional review and oversight of political and anti-corruption disputes, the Court often intervenes when conflicts arise between branches. This assertiveness has reinforced democratic stability, while also generating debate about the proper boundaries of judicial power in a presidential system.⁴