Brazil’s opposition is preparing an Independence Day rally on Monday as Senator Flavio Bolsonaro seeks to capitalize on a crisis at the country’s Supreme Court and strengthen his campaign against President Luiz Inacio Lula da Silva ahead of next month’s election. Organizers are presenting the demonstration as a protest against Lula’s government and Supreme Court Justice Alexandre de Moraes, whose pursuit of former President Jair Bolsonaro over a coup plot led to the former president’s conviction. The main protest is scheduled for Paulista Avenue in São Paulo, with polls showing Flavio Bolsonaro running neck and neck with Lula. The rally follows an unprecedented dispute among Supreme Court justices after Justice Andre Mendonca disclosed a report questioning alleged contacts between Moraes and a banker accused of leading a multibillion-dollar fraud scheme. Moraes responded by seeking an investigation into Mendonca for alleged abuse of authority. A large turnout could intensify calls to investigate Moraes and assist Flavio Bolsonaro’s argument that his father is the target of political persecution. Jair Bolsonaro is under house arrest and barred from running for office. Lula is expected to attend the annual Independence Day military parade in Brasilia, continuing a tradition observed by Brazilian presidents.