Justice Minister André Mendonça publicly accused Supreme Court President Alexandre de Moraes of lying and requested that Justice Luís F. Fachin, a member of the Court’s internal affairs board, open a formal investigation into the alleged misconduct.
Accusation and Request for Probe
The allegation was announced by Mendonça in a statement that did not specify the precise statements he deemed false, but emphasized that the integrity of the judiciary must be protected. He asserted that Moraes had provided misleading information in a matter that, according to the minister, warranted scrutiny by the Court’s own disciplinary mechanisms.
“Mendonça says Moraes lies and asks Fachin to investigate,” reported the Brazilian outlet Poder360.
Following the accusation, Mendonça formally appealed to Justice Luís F. Fachin, who chairs the Supreme Court’s internal investigations committee, to initiate an inquiry. Fachin’s role includes examining allegations of ethical breaches or procedural violations by fellow justices, making his involvement a key step in any potential disciplinary process.
Political Context
Alexandre de Moraes, appointed as president of Brazil’s Supreme Court in 2022, has been a central figure in several high‑profile investigations involving former President Jair Bolsonaro and other political actors. His tenure has been marked by frequent clashes with President Luiz Inácio Lula da Silva’s government, which has sought to assert its authority over the judiciary.

André Mendonça, a close ally of President Lula and former federal prosecutor, took office as Justice Minister in the current administration. His portfolio includes overseeing the federal justice system and coordinating legal policy, positioning him at the intersection of executive ambitions and judicial independence.
The request for an investigation comes amid broader debates over the balance of power in Brazil’s democratic institutions. Critics of the judiciary argue that it has overstepped its mandate, while legal scholars warn that political interference could erode the court’s autonomy.
As of now, neither Alexandre de Moraes nor Justice Fachin has issued a public response to Mendonça’s claim. The Supreme Court’s internal affairs board typically operates behind closed doors, and any decision to launch a formal probe would be announced through a separate statement.

If an investigation proceeds, it could set a precedent for how allegations of misconduct by senior judges are handled, potentially influencing future interactions between Brazil’s executive branch and its highest court. Observers note that the outcome may affect public confidence in the judiciary at a time when the nation faces multiple legal challenges, including corruption probes and disputes over electoral reforms.
International analysts are watching the development closely, viewing it as a barometer for Brazil’s institutional resilience. The episode underscores the delicate equilibrium that democratic systems must maintain when the branches of government hold each other accountable while preserving their respective independence.