Brazil’s Supreme Federal Court is confronting an unprecedented internal conflict as it considers whether to investigate Justices Alexandre de Moraes and André Mendonça. Moraes asked the court to investigate Mendonça for abuse of authority after a report publicized by Mendonça raised suspicions that Moraes had improper contact with disgraced banker Daniel Vorcaro, who allegedly led a multibillion-dollar fraud. A federal police report also identified messages allegedly sent by Vorcaro that appeared to suggest Moraes warned him of an impending arrest, along with a contract involving Moraes’ wife’s law firm. Chief Justice Edson Fachin gave the attorney general five days to respond to Moraes’ allegations, while the court is expected next week to decide whether to investigate Moraes. The dispute has intensified Brazil’s election politics, with conservatives organizing protests against Moraes and parties pressing for judicial reform. The outcome could affect public trust in a court that has taken an increasingly decisive role in government affairs, including decriminalizing personal marijuana possession, blocking laws that would limit environmental protections and arresting former President Jair Bolsonaro after his conviction for threatening democracy.