Three Powers: what each does and how they balance in Brazil

Every time a president vetoes a bill, Congress overturns that veto, or the Supreme Federal Court suspends a norm as unconstitutional, a mechanism designed over two centuries is at work with a single goal: to prevent anyone from concentrating too much power. The 1988 Constitution sums up the arrangement in one sentence, in its Article 2:

The Union's Powers are independent and harmonious with each other: the Legislative, the Executive, and the Judiciary.

Independent and harmonious: those two words hold the secret — and the perpetual tension — of Brazilian democracy. Understanding what each branch does, and how one limits the other, is the foundation of any serious reading of political news.

From Montesquieu to Brazil

The idea of dividing power is ancient. Thinkers such as John Locke already advocated separating those who make laws from those who execute them, but it was the French philosopher Montesquieu, in his classic *The Spirit of the Laws* published in the 18th century, who cemented the triad the world adopted: Legislative, Executive and Judicial. His argument remains relevant: anyone who holds power tends to abuse it, so power must check power. The United States Constitution turned the theory into institutional engineering with a system of checks and balances that inspired modern republics.

Brazil followed its own path. The Imperial Constitution of 1824 provided for four powers: in addition to the three classic ones, the Moderating Power, exercised by the emperor, who could dissolve the Chamber and dismiss cabinets — effectively a supremacy of the Crown over the others. Only with the Republic and the 1891 Constitution did the country adopt the classic tripartite system. The 1988 Constitution not only reaffirmed it but also fortified it: the separation of powers is a permanent clause that cannot be abolished even by a constitutional amendment.

Executive: governing, administering, executing

The Executive Branch is the most visible face of the State. At the federal level, it is headed by the President of the Republic, who combines the roles of head of state, representing the nation, and head of government, directing the administration. The president is elected for a four-year term, with the possibility of one consecutive re-election, and governs with the help of cabinet ministers, whom he appoints freely.

The Executive is responsible for putting laws into practice: collecting taxes and executing the budget, maintaining public services, conducting foreign policy and commanding the Armed Forces. It also takes part in the legislative process — signing or vetoing bills, proposing laws and issuing provisional measures, regulations with immediate force of law that require later approval by Congress. The same structure repeats in the states, with governors, and in municipalities, with mayors: federalism distributes the Executive across three levels.

Legislative: making laws and overseeing those who govern

The National Congress is bicameral. The Chamber of Deputies, with 513 members elected in proportion to each state's population, represents the people; the Federal Senate, with 81 members — three per state and the Federal District — represents the federative entities, serving eight-year terms. Deputies are renewed every four years; the Senate is renewed alternately, by one-third and two-thirds.

Legislating is only half the job. The other half, less discussed, is oversight: Congress monitors the Executive's actions with the help of the Federal Court of Accounts, approves the federal budget, creates parliamentary inquiry committees with investigative powers and holds hearings for officials nominated by the president. The Legislature also approves constitutional amendments, which require a three-fifths majority in two rounds in both houses.

Judicial: applying the law and safeguarding the Constitution

The Judiciary resolves conflicts by applying the law — between individuals, companies and, crucially, among the branches themselves. At its apex stands the Supreme Federal Court, with eleven justices, the guardian of the Constitution: it delivers the final word on what is constitutional or not. Below it, the Superior Court of Justice standardizes the interpretation of federal law, and specialized branches — Labor, Electoral and Military courts — coexist with the ordinary state and federal courts.

Judges are not elected, and this is intentional: to adjudicate without fear of displeasing majorities, they enter through public examinations and enjoy guarantees such as tenure and non-reducible salaries. Supreme Court justices are the exception that underscores the intertwining of the branches: nominated by the President, they must be vetted and approved by the Senate before taking office — and they remain in post until mandatory retirement.

Checks and balances: how each branch limits the others

The independence of the branches does not mean isolation. The system was designed so that each one interferes, in a controlled way, with the others:

• The Executive vetoes laws approved by Congress, nominates ministers of the higher courts and issues provisional measures.
• The Legislature overturns vetoes by absolute majority, rejects provisional measures, approves or blocks nominations to the Supreme Court, can suspend Executive acts that exceed regulatory power and holds the key to impeachment: the Chamber authorizes the process and the Senate tries the president.
• The Judiciary can declare laws of Congress and Executive actions unconstitutional, ensuring that no political majority tramples over the Constitution.

These mechanisms are not abstract theory. Since the return to democracy, Brazil has seen two presidents removed by impeachment — Fernando Collor in 1992 and Dilma Rousseff in 2016 — presidential vetoes overturned and laws suspended by the Supreme Court. The Judiciary, in turn, also has checks: the National Council of Justice oversees judges' administrative conduct, and the courts' budgets pass through Congress.

Balance in motion — and in dispute

In practice, the boundary between the branches is a permanent battlefield. The term “judicialization of politics” is used when issues that Congress avoids deciding end up in the Supreme Court, and “judicial activism” when courts are perceived to have gone beyond interpreting the law. Conversely, the heavy use of provisional measures has been criticized as the Executive encroaching on the legislative function. These tensions are not a flaw in the system: they are the system at work. The 1988 design bets that controlled friction among institutions is safer than the tranquility of single-power regimes — a lesson Brazil, with two decades of military dictatorship in its memory, learned the hard way.

Why this matters in your daily life

Knowing what each branch does changes how you hold them accountable. A pothole in the street and a line at the health post are municipal Executive responsibilities; the law that creates or eliminates a tax passes through the Legislature; the decision that secures a medication in court comes from the Judiciary. At the ballot box, voters only choose the first two, making it even more important to understand how the third is constituted and controlled.

The separation of powers is not a decorative arrangement: it is the core technology that shields ordinary citizens from arbitrariness. Every veto overturned, every Senate hearing, every law reviewed by the Supreme Court is a gear of this mechanism turning. Knowing it makes the difference between watching political news as a fan — and reading it as a citizen who knows exactly what to demand, from whom and why.