Brazil 2026: An election about power, justice and the limits of politics

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Political and institutional analysis | October 2026

ACCRA – Brazil goes to the polls on October 4 in an election that is about more than who will occupy the presidential palace for the next four years. The contest between President Luiz Inácio Lula da Silva and conservative Senator Flávio Bolsonaro is also a test of the relationship between the executive, Congress, the Supreme Court and Brazil’s electoral institutions after four years of political and legal confrontation.

The first round will elect the president, governors, senators and members of the Chamber of Deputies and state legislatures. If no presidential candidate wins more than half of the valid votes, a runoff will be held on October 25.

The congressional vote may prove nearly as consequential as the presidential contest, all 513 seats in the Chamber of Deputies are being contested, as are 54 of the Senate’s 81 seats. The composition of Congress will determine how much room the next president has to legislate, approve budgets and pursue institutional changes.

That makes the 2026 election a broader referendum on Brazil’s political system, not simply a rematch between Lula and the Bolsonaro family.

From the 2022 election to Bolsonaro’s conviction

The current political confrontation began with one of Brazil’s closest presidential elections.

Lula defeated Jair Bolsonaro in the 2022 runoff by 50.9% to 49.1%, ending Bolsonaro’s presidency by a margin of just over two million votes.

The transition was followed by protests, calls for military intervention and, on January 8, 2023, the storming of Congress, the presidential palace and the Supreme Court by Bolsonaro supporters.

The judicial consequences have been substantial.

In 2025, the Supreme Court convicted Bolsonaro of crimes including armed criminal organisation, violent abolition of the democratic rule of law, coup d’état, aggravated damage to public property and deterioration of protected heritage. The sentence was 27 years and three months in prison. The court subsequently rejected appeals against the conviction.

The legal process has therefore moved beyond political accusation, Bolsonaro has received a final criminal conviction from Brazil’s highest court.

In 2026, however, his imprisonment has been modified on humanitarian grounds, the Supreme Court has maintained him under house arrest, citing his medical condition.

This distinction matters politically. Bolsonaro cannot compete for the presidency, but his political influence has not disappeared. It has instead been transferred to his family and, above all, to Flávio Bolsonaro.

Flávio Bolsonaro and the politics of succession

Flávio Bolsonaro is attempting to preserve the political coalition built by his father while presenting a more conventional presidential campaign.

His platform emphasises public security, conservative social policies, economic liberalism and criticism of the Supreme Court. His campaign also draws heavily on Jair Bolsonaro’s political identity, turning the former president’s legal battles into an electoral issue.

That creates an unusual constitutional problem.

A Flávio Bolsonaro presidency would not automatically erase his father’s conviction. The Brazilian presidency does not give the executive unrestricted authority to overturn judicial decisions.

But a president does have significant influence over the institutional environment in which the judiciary operates, including the appointment of Supreme Court justices when vacancies arise. Combined with a supportive Congress, that could give a Bolsonaro administration substantial influence over the future balance between the executive, legislature and judiciary.

The question is therefore not simply whether Bolsonaro’s political movement returns to power. It is whether it would return with sufficient institutional support to reshape the political relationship between the branches of government.

Lula faces a different political test

Lula enters the election seeking another term after a presidency marked by falling unemployment, expanded social programmes and efforts to restore Brazil’s international role.

But the economic picture is not sufficient to remove political pressure.

The president continues to face concerns over living costs, public security and perceptions of government performance. The campaign has also been affected by the broader corruption and institutional controversies surrounding the Bolsonaro camp.

Polling in the final days suggests a highly competitive race. A Quaest survey reported by Reuters on September 28 put Lula at 39% in the first round and Flávio Bolsonaro at 34%. In a simulated runoff, the two were tied at 42% each, within the poll’s margin of error.

Those numbers should not be interpreted as a forecast. They are a measurement of voter intentions at a particular moment, with undecided voters and campaign developments still capable of changing the final result.

The political significance is nevertheless clear: neither side can assume that the 2022 polarisation will automatically reproduce itself in 2026.

Banco Master turns finance into an electoral issue

The most complicated new dimension of the campaign is the investigation surrounding Banco Master and banker Daniel Vorcaro.

The case has expanded from a financial investigation into a broader political controversy because of Vorcaro’s contacts with politicians and the financing of Dark Horse, a film about Jair Bolsonaro starring American actor Jim Caviezel.

Investigators are examining the flow of funds associated with the project. Reporting based on police documents has identified Flávio Bolsonaro as an intermediary in discussions with Vorcaro over financing. Around R$61 million was reportedly transferred to support the project, according to documents cited by Brazilian media.

The crucial issue is not simply that a businessman financed a political film.

It is whether the money used for the production came from legitimate private resources, whether any of it was connected to funds allegedly obtained through financial crimes, and whether resources were diverted to purposes unrelated to the film, those questions remain under investigation.

Brazilian authorities are also examining whether part of the money connected to the project may have been used to support Eduardo Bolsonaro in the United States. These are allegations under investigation, not established criminal findings against Flávio Bolsonaro, that distinction is essential.

The political consequences, however, do not depend entirely on a final court judgment. The investigation has already placed campaign financing, banking regulation and political influence in the same electoral conversation.

Dark Horse and the politics of political imagery

The Dark Horse controversy illustrates another feature of the 2026 campaign: the increasing convergence of politics, entertainment and technology.

The film attempts to present Jair Bolsonaro through a sympathetic political narrative even though the former president is imprisoned and subject to restrictions on political communication.

The campaign has also used an AI-generated representation of Bolsonaro, allowing his political persona to remain visible even when his ability to communicate directly is restricted. Reuters reported the use of the AI avatar as part of Flávio Bolsonaro’s campaign strategy.

Brazil’s electoral authorities have introduced specific rules governing the use of artificial intelligence in campaigns. The issue is larger than the Bolsonaro family: synthetic political content creates new questions about authenticity, attribution and the ability of voters to distinguish political speech from digitally manufactured material.

The election therefore offers an early test of how established democracies adapt electoral rules to generative AI.

The Supreme Court is both referee and participant in the political debate

The Brazilian Supreme Court occupies an unusually prominent position in the country’s political system.

Its role after January 8 has been defended by supporters as necessary to protect democratic institutions. Bolsonaro’s conviction is the clearest legal consequence of that approach.

But the Court’s expanded role has also generated criticism from Bolsonaro’s supporters and other opponents, who argue that some judges have accumulated excessive political power, the debate is no longer confined to Brazil.

The Trump administration imposed sanctions on Supreme Court Justice Alexandre de Moraes in 2025 and increased pressure on Brazil over the treatment of Bolsonaro. The episode transformed a domestic judicial dispute into an issue of US-Brazil relations and national sovereignty.

The result is a difficult institutional equation: the Supreme Court is expected to enforce constitutional rules while simultaneously becoming one of the central targets of political mobilisation.

That creates a risk for the Court regardless of which side wins the election. Its authority depends not only on legal powers, but also on public confidence that those powers are being exercised within predictable institutional boundaries.

Congress may determine what happens next

The presidential race is attracting most of the international attention, but the congressional election may ultimately determine the limits of the next government’s agenda.

Brazil’s political system requires the president to negotiate with Congress on legislation, spending and major reforms. A president without a workable congressional coalition can face significant constraints even with a strong electoral mandate.

For Lula, a supportive Congress would make it easier to pursue economic and social policies.

For Flávio Bolsonaro, congressional support would be particularly important if his administration sought to change legislation affecting public security, the judiciary or the political treatment of Bolsonaro allies.

The Senate is especially important because it participates in the confirmation process for Supreme Court nominees and plays a central role in certain constitutional and impeachment procedures.

That makes October 4 a contest for institutional power across several levels at once.

The economic dimension is being underestimated

The political confrontation also carries economic consequences.

Brazil remains one of the world’s largest emerging markets, and investors will be watching the next administration’s approach to fiscal policy, public spending, regulation and relations with major trading partners.

Political instability does not automatically translate into economic crisis. Brazil has deep financial markets, a floating currency and established institutions.

But prolonged confrontation between the executive, Congress and judiciary could increase uncertainty over regulation and policy implementation.

The Banco Master investigation adds another layer. Financial scandals are particularly damaging when they raise questions not only about a single institution but about regulatory supervision, political connections and the effectiveness of compliance mechanisms.

The economic question after the election will therefore extend beyond who controls the Treasury. It will include whether Brazil can strengthen confidence in the institutions responsible for supervising its financial system.

A more consequential election than 2022

The 2026 election is often described as another Lula-Bolsonaro confrontation, that description is incomplete.

In 2022, the central question was who would govern Brazil after the Bolsonaro presidency.

In 2026, the question is broader, what institutional settlement will emerge from the conflicts that followed that election?

A Lula victory would preserve the political direction established since 2023, while leaving unresolved the broader dispute over the Supreme Court’s role and the political strength of the Bolsonaro movement.

A Flávio Bolsonaro victory would represent the return of the Bolsonaro family to the presidency and would immediately raise questions about the relationship between the new government, the judiciary and the unresolved legal cases involving members of the family.

Neither scenario automatically determines what Brazil’s institutions will do next. Much will depend on Congress, the courts, prosecutors, regulators and the ability of political actors to operate within constitutional limits, that is ultimately the central test of October 4.

Brazil’s democracy has survived a disputed election, an attempted institutional rupture, mass political violence, a presidential conviction and an unusually intense confrontation between political branches.

The next stage will reveal whether those institutions can move from crisis management back towards normal political competition.

For Brazil, that may prove more important than the presidential result itself.