Justice Alexandre de Moraes of Brazil's Supreme Court has issued an arrest warrant for Eduardo Bolsonaro, 42, ordering him to begin serving a four-year sentence immediately. The conviction stems from lobbying the United States to interfere in the trial of his father, former President Jair Bolsonaro — specifically, pushing for sanctions on Brazilian government officials and higher tariffs on Brazilian exports. De Moraes also cancelled Eduardo's Brazilian passport and instructed federal police to arrest him if he returns. The timing is explosive. Brazil holds its presidential runoff on October 25 between incumbent Luiz Inácio Lula da Silva and Flavio Bolsonaro, Eduardo's brother and the current frontrunner. Eduardo has been a critical intermediary between Flavio and the Trump administration, accompanying him to a May 2025 White House meeting with President Donald Trump. Removing Eduardo from the board severs a live diplomatic channel between the Bolsonaro campaign and its most powerful foreign ally. Eduardo Bolsonaro moved to Texas in March 2025, surrendering his seat in Brazil's National Congress and his federal police investigator position to "focus 100 percent" on freeing his father, who was sentenced in September 2025 to 27 years in prison for plotting a coup. He holds a US green card. De Moraes ruled that Eduardo "cannot benefit from his own wrongdoing by fleeing the national territory to an unknown location for the purpose of thwarting the application of criminal law." De Moraes is no neutral actor in this drama. He chaired the investigation that led to Jair Bolsonaro's 27-year sentence and is openly regarded by the Bolsonaro family as a political enemy. Both sides of Brazil's deeply polarized divide accuse each other of corruption and lawfare — the arrest warrant will confirm every narrative the Bolsonaro base already holds about judicial persecution while reinforcing the institutional left's narrative about accountability for coup plotters. The structural question is whether Brazil's judiciary is functioning as a check on power or as a participant in the election. The conviction itself — lobbying a foreign government to sanction your own country's officials — is a serious charge with real substance. But the decision to order immediate imprisonment weeks before a runoff, issued by a justice with a documented adversarial relationship with the defendant's family, collapses the distinction between law enforcement and political strategy. The international dimension makes this combustible. Eduardo Bolsonaro is a green card holder living in Texas. Executing this warrant requires either his voluntary return or an extradition request to the United States — which would put the Trump administration in the position of choosing between its Bolsonaro alliance and US-Brazil institutional relations. The passport cancellation is enforceable; the arrest itself is not, absent Brazilian-US cooperation. Brazil is now running a presidential election in which one candidate's brother is a convicted felon under active arrest warrant, his father is serving 27 years, and the judge behind both sentences is a declared enemy of the family. Whether you read this as the rule of law working or lawfare reaching its final form depends entirely on which side of the polarization you inhabit — and that is precisely the problem.