Brazil's Supreme Court Faces Its Deepest Crisis in Decades

Folks, the highest court in Brazil is about to do something it has never done in four decades of democracy: decide whether to investigate one of its own. And the man at the center of it all, Justice Alexandre de Moraes, is the same judge who put a former president in the dock. This is not a procedural squabble. This is the Supreme Court judging itself, just over three weeks before a national election.

Brazil's Supreme Court Faces Its Deepest Crisis in Decades

Brasília, Brazil — Brazil's Supreme Federal Court (STF) is in the deepest internal crisis since the country returned to democracy four decades ago, according to Reuters and Conjur, as an open conflict between justices over a Federal Police report into suspected improper contacts between Justice Alexandre de Moraes and disgraced banker Daniel Vorcaro heads to an extraordinary plenary session on September 15. The court is weighing whether to authorize an investigation of one of its own members, and whether to investigate Justice André Mendonça as well. It matters to every Brazilian because the court that referees the country's elections, corruption cases and constitutional fights is now asking whether it can referee itself.

What Happened Inside the Court

On September 1, Justice André Mendonça declassified a Federal Police report containing text messages that Vorcaro, founder of the liquidated Banco Master, allegedly sent to Moraes, per the court record and Conjur. The report raised suspicions that Moraes warned the banker of his impending arrest, and it revealed a contract between Vorcaro and the law firm of Moraes' wife, Viviane Barci de Moraes. Mendonça asked for the matter to be debated in a public plenary session.

Moraes denies any irregularity. His wife's law firm says the contracts followed legislation and applicable legal rules, according to Agência Brasil. On September 3, Moraes asked the court to investigate Mendonça for abuse of authority, citing an intelligence report. That same day, Chief Justice Luiz Edson Fachin opened a new proceeding and gave Moraes, Mendonça, Prosecutor-General Paulo Gonet and Federal Police director-general Andrei Rodrigues five business days to provide clarifications.

On September 4, Fachin unified the two requests into a single petition run from the presidency of the court, per Poder360. Gonet's office had already argued that Mendonça had no authority to deepen an inquiry touching a fellow justice — only the full bench can order that — and asked for the procedure to be annulled. So by the end of the first week, the court had two justices pointing at each other, a prosecutor questioning the legality of the whole file, and a chief justice trying to hold the pieces together.

The Police Chief Caught in the Middle

Then the crisis spilled into the Federal Police. On Tuesday, September 8, Mendonça suspended Rodrigues and Federal Police intelligence director Leandro Almada, alleging that Federal Police officers produced intelligence reports meant to monitor him and other authorities, according to CNN Brasil. Eleven other Federal Police directors signed a letter backing Rodrigues and placing their own posts at the disposal of the force. Brazil's solicitor-general (AGU) appealed to Fachin.

On Wednesday, September 9, Justice Flávio Dino ordered Rodrigues reinstated immediately, saying the removals were unsupported by evidence and carried "equally real and immediate" risk of harm to ongoing investigations, per Reuters. Fachin then suspended both rulings, leaving Rodrigues in his post, and gave him 48 hours to provide information before Fachin decides whether he stays.

Read that sequence again. One justice removes the top federal police official. Another justice puts him back. The chief justice freezes both decisions and asks for paperwork. That is not how a court normally operates. That is a court improvising in real time, and the Federal Police — the agency that investigates everyone else in this country — is now a bargaining chip inside the building.

The Banker, the Messages and the Law Firm

Here is the core of the underlying case, and why it has teeth. Vorcaro is in prison. He and Moraes met at least six times, according to the Federal Police report, and two days before his arrest the banker discussed with the minister the possibility of being targeted by a Federal Police operation, per the same record. The report also revealed the contract between Vorcaro and the law firm of Moraes' wife.

Moraes denies any irregularity, and the law firm says the contracts followed legislation and applicable legal rules, per Agência Brasil. Those are the defenses on the record, and they deserve to be stated plainly. But the question the court now faces is not whether Moraes is guilty. It is whether the material Mendonça declassified can even be used, and whether a justice can unilaterally open a line of inquiry that touches a colleague.

That is the trap. If the bench finds Mendonça's order irregular, the material could be thrown out and no inquiry into Moraes opened. If it finds the order valid, the court opens a formal investigation into one of its own — a first in the democratic era. Either way, someone on that bench loses, and the public is watching.

A Court Judging Itself

Under the Constitution and the court's internal rules, the STF itself judges its members for common crimes, with the Federal Police investigating under a relator drawn by lot among Moraes' nine colleagues, per Conjur. Opening an inquiry would not automatically remove Moraes from the bench. Only the Prosecutor-General's office could later file charges or ask for the case to be closed.

Felipe Recondo, a journalist and researcher who has covered the court for decades, put the stakes bluntly: "This may be the most dramatic moment in the history of Brazil's Supreme Federal Court." He added: "So for the court, whatever decision it makes is a bad one."

Rubens Glezer, a law professor at the Getúlio Vargas Foundation, said the clash "highlights how the court can no longer hide the internal political rifts that are weakening its standing from within." And Leonardo Barreto of political consultancy Think Policy said: "We're in a moment of great uncertainty." That is the honest summary. There is no clean exit here, and the justices know it.

What the Full Bench Will Decide

Fachin scheduled an extraordinary in-person plenary session for Tuesday, September 15 at 10 a.m. on Petition 16,662, to decide whether to authorize an investigation of Moraes, per Poder360 and Agência Brasil. It would be the first time the court has weighed opening an inquiry against one of its own members.

The court has 11 seats; one has been vacant since Justice Luís Roberto Barroso retired in October 2025, so ten justices are expected in the room. Justice Dias Toffoli declared himself impeded in Banco Master matters in February after acknowledging dealings with funds linked to Vorcaro. It is unclear whether Moraes and Mendonça will vote; jurists recommend all three abstain, according to Conjur.

Reported leanings before the vote: Gilmar Mendes, Flávio Dino and Cristiano Zanin are seen as against opening an investigation; André Mendonça, Nunes Marques and Luiz Fux are seen as in favour, per Estadão and Poder360. That leaves Fachin and Cármen Lúcia as the decisive votes. Neither had declared a position. Two votes, in a room of ten, deciding whether the court investigates itself.

Why the Timing Is Explosive

On September 9, Fachin also removed Moraes from the relator's seat of the "fake news" inquiry opened by the court in March 2019, taking it over himself while preserving Moraes' earlier decisions in the case. He cancelled that afternoon's plenary session. Retired justices and former court presidents published a letter demanding an "immediate and rigorous" inquiry into what they called "the most acute crisis in its history," per O Globo.

On September 10, Fachin spent the day in one-on-one consultations with Moraes, Mendonça, Toffoli, Fux, Nunes Marques, Zanin and Cármen Lúcia, and with Gonet, according to CNN Brasil. He distributed the complete case file to all justices' chambers and cancelled the plenary session for a second consecutive day. He also asked for the secrecy seal to be lifted on Petition 15,556 and related Banco Master procedures, keeping confidential only specific operations still in progress.

That last move matters. Fachin is trying to get ahead of the transparency problem before it swallows the court. But on September 11, ministers told Fachin that a "pedido de vista" — a request for more time to review — could interrupt the September 15 judgment before any ruling, per Poder360. Allies of Moraes argued the questions involving Mendonça should be judged jointly, since both stem from the same crisis. The Mendonça front has not yet been scheduled, and Fachin's deadline for Mendonça's clarifications runs to September 21.

The Election Three Weeks Out

Brazil's general election is October 4. That is 19 days after the session now set for September 15. Lula and Senator Flávio Bolsonaro are statistically tied in a potential runoff, according to two polls that also lifted Brazilian markets on September 8, per Reuters.

Lula said on X that it was "essential to investigate everyone, without shielding anyone, no matter who it hurts," and described the Banco Master case as "the greatest financial crime in Brazil's history." He also said: "The Brazilian people need explanations and immediate measures to confront the institutional crisis that has taken hold of the judiciary."

Flávio Bolsonaro, campaigning in the city where his father survived a stabbing in 2018, blamed Lula: "Brazil is without a president, Brazil is without leadership. Everything that is happening is chaos left behind by Lula." Analysts say a Bolsonaro victory could fuel a push in the Senate to impeach Supreme Court justices, per DW. So the court's crisis and the campaign are now the same story. Every vote in that plenary session lands inside an election.

What Comes Next

Some justices are pushing for the September 15 session to be held closed, without the usual live broadcast on TV Justiça, to avoid a public clash between Moraes and Mendonça, per Times Brasil/CNBC. Fachin has not decided, fearing a closed session would feed criticisms about the court's transparency. That is the whole dilemma in one scheduling choice: open the doors and risk a televised brawl, or close them and confirm every suspicion about secrecy.

Recondo framed what is really at stake beyond the personalities. "The Supreme Court can provide some balance in that game," he said. "Remove the Court from that position, and all that remains is conflict. And that is a problem."

So here is your action step. Mark September 15 on your calendar. At 10 a.m. Brasília time, watch whether the session is open or closed, watch whether a pedido de vista delays the vote, and watch Fachin and Cármen Lúcia. Those two votes decide whether Brazil's Supreme Court investigates one of its own — and whether the institution that is supposed to settle the country's fights can still settle its own.

This article was produced with AI-assisted research and editorial support. Sources: Reuters, Agência Brasil, Conjur, CNN Brasil, Poder360, Estadão, O Globo, DW, and Times Brasil/CNBC.

By Jessica Ali, Staff Writer