Brazil Supreme Court Bias Claims: Examining the Evidence

Brazil's 1988 Constitution, drafted at the end of two decades of military dictatorship, built what legal scholars call "an extremely powerful Supreme Court" as a deliberate counterweight to the "authoritarian hyper-presidential regime" that governed the country from 1964 to 1985; Article 102 designates the STF as the body charged with guarding the constitutional pact ^[9].

The Economist has described Brazil's STF as "the most powerful Supreme Court in the world," noting that individual justices can issue injunctions with immediate, binding, nationwide effect — a degree of individual judicial power with no real analogue in the U.S. system, where emergency powers of a single justice are far more limited ^[8].

Context for current judicial actions begins with the January 8, 2023 attacks, when thousands of Bolsonaro supporters stormed Brazil's Congress, Supreme Court, and presidential palace, vandalizing historic artworks and demanding military intervention to overturn the 2022 election ^[10].

The attacks followed months of false claims that Brazil's electronic voting system was fraudulent — claims election authorities had repeatedly debunked. Academic analysis of the attack found that disinformation about alleged fraud spread heavily beforehand, with activity on Twitter/X measurably predicting subsequent waves of coordinated WhatsApp messaging and mainstream news coverage in the run-up to the riot ^[3].

The ban did not arrive out of nowhere. Justice de Moraes began ordering the suspension of specific X accounts in April 2024, saying they were spreading disinformation and hate speech; X's ownership resisted, and de Moraes ultimately gave the company 24 hours to name a legal representative in Brazil or face suspension ^[1].

X missed that deadline — it had withdrawn its Brazilian staff and had no legal representative in the country, meaning it could not lawfully receive court orders. That non-compliance with a requirement applied to every company operating in Brazil, not a specific content dispute, is what triggered the nationwide suspension on August 30, 2024 ^[1].

The ban lasted 39 days. X was reinstated on October 8–9, 2024, after appointing a legal representative and paying roughly R$28.6 million (approximately $5.7 million at the prevailing exchange rate) in accumulated fines ^[2].

The claim that the STF systematically targets only conservatives requires examination against the record. Several facts complicate this narrative:

Prosecution across the spectrum: the STF has also acted against the left. Former President Lula was convicted and imprisoned in 2018 in a corruption case; the Supreme Court later annulled those convictions in 2021, after finding the trial judge had been biased and had exceeded his jurisdiction — a procedural reversal, not an exoneration on the underlying facts ^[9].

Documented threats: a five-justice STF panel voted unanimously on September 2, 2024 to uphold the X suspension — a decision joined by justices with varied appointment histories, not a single ideological bloc ^[4].

Institutional composition: the 11-member STF includes two justices appointed by Bolsonaro himself (Kássio Nunes Marques and André Mendonça), undercutting the claim that the court is a uniformly left-leaning body ^[17].

Freedom House's 2024 report rates Brazil as "Free" with a score of 72/100, describing aggressive judicial action against election misinformation as a response to documented threats to democratic institutions rather than as partisan repression ^[11].

Reporters Without Borders ranked Brazil 82nd globally in its 2024 press freedom index — a middling score reflecting violence against journalists more than judicial suppression of the press specifically ^[12].

Legal analysis from Lawfare concluded the STF's inquiry procedures operate within Brazil's constitutional framework (Article 102), while noting that even a sitting STF justice, Luiz Fux, has publicly warned that "no judge should be an inquisitor," criticizing the concentration of investigative and judicial power in a single justice's hands ^[13].

Amnesty International's Brazil reporting focuses primarily on police violence, Indigenous land rights, and environmental destruction (deforestation and wildfires) rather than on judicial overreach against political actors ^[14].

Human Rights Watch's most recent World Report documents the STF's continued role investigating the 2023 coup plot, but it also raises genuine transparency concerns: it found de Moraes had issued dozens of confidential orders suspending roughly 150 X accounts, with no public criteria for how or whether suspended accounts could be reinstated ^[15].

Transparency International's Corruption Perceptions Index does not support a tidy narrative either way: Brazil's score fell to a multi-year low of 34/100 in 2024 before ticking up one point to 35 in 2025 — a trend that reflects broader governance perceptions, not a verdict on the judiciary's political conduct ^[16].

Justice Alexandre de Moraes has become the central figure in these controversies. Appointed by center-right President Michel Temer in 2017, he has led the investigations into election misinformation and the January 8 attacks. Critics say he effectively acts as investigator, prosecutor, and judge in the same proceedings ^[6].

Legal experts quoted by Americas Quarterly said there is "no precedent" for one justice leading investigations that "almost become permanent institutions," and separately criticized Moraes for maintaining a "very high level of secrecy" over some proceedings, which they said makes it difficult for defense lawyers to do their work ^[6].

These are not merely partisan complaints. In July 2025, the U.S. Treasury and State Departments sanctioned de Moraes directly, with the Treasury Secretary calling him responsible for "an oppressive campaign of censorship, arbitrary detentions... and politicized prosecutions" ^[19]. That action came from the Trump administration and was widely read as a political response aligned with Bolsonaro's allies and Musk, not a neutral assessment — but it marks the first time a foreign government formally sanctioned a sitting STF justice, and it should not be omitted from any account of this dispute.

Claims of STF bias typically omit several crucial facts:

First: the January 8 attacks were real, documented events with extensive evidence of coordination through social media that violated Brazilian law ^[10][3].

Second: X's suspension followed its failure to comply with a legal-representative requirement applied to every company operating in Brazil, not solely a content-moderation disagreement ^[1].

Third: the STF's 11 seats include two Bolsonaro appointees, and the panel that upheld the X ban ruled unanimously ^[17][4].

Fourth: mainstream international democracy watchdogs (Freedom House, RSF) have not characterized Brazil's judiciary as systematically biased or authoritarian — though in 2025 the U.S. government itself broke with that consensus by sanctioning de Moraes, a genuinely new and relevant data point ^[11][19].

Two developments since the original 2024 controversy sharpen this picture. In September 2025, a Supreme Court panel convicted Bolsonaro of plotting a coup and sentenced him to just over 27 years in prison — a 4-1 ruling in which Justice Luiz Fux, notably, voted to acquit, arguing the events did not meet the legal definition of a coup. That dissent from within the court undercuts the idea of the STF as a monolithic, uniformly anti-Bolsonaro bloc ^[18].

And in July 2025, the United States sanctioned de Moraes under human-rights authorities, citing censorship and arbitrary detention — a step taken by an openly sympathetic U.S. administration, but one that means the "authoritarian judge" narrative is no longer only a fringe social-media claim; it now has the weight of formal U.S. government action behind part of it, even as independent monitors like Freedom House have not followed suit ^[19][11].

The narrative that Brazil's Supreme Court operates simply as a tool of political persecution against conservatives does not hold up as a categorical claim: it requires ignoring the documented January 8 attacks, X's own non-compliance with Brazilian corporate law, a unanimous panel ruling, and a court that includes Bolsonaro's own appointees ^{[10][1][4][17]}.

At the same time, the dossier's original framing overstated how settled this question is. Human Rights Watch has documented real, specific transparency and proportionality problems with de Moraes's account-suspension orders; a sitting STF justice has publicly criticized the concentration of investigative power in one colleague's hands; and in 2025 the U.S. government took the unprecedented step of formally sanctioning a sitting STF justice ^[15][13][19].

Overall: the sweeping claim that Brazil's judiciary systematically persecutes conservatives while giving the left a pass is misleading — it conflates a real, high-stakes constitutional response to a documented insurrection and a company's legal non-compliance with a simple story of authoritarian censorship. But narrower, more specific criticisms of de Moraes's methods — secrecy, the concentration of investigator-and-judge power in one office, and proportionality of account bans — are made by genuinely independent observers, not just partisan critics, and deserve to be taken on their own terms rather than dismissed wholesale.