A crisis is shaking Brazil’s Supreme Court. Here’s what to know

RIO DE JANEIRO -- Brazil’s Supreme Court is in the throes of an unprecedented crisis. Sessions are being canceled. Justices are overruling one another’s decisions. And suspicions of graft, political bias and police interference loom over several of its members ahead of the country's presidential election in October.The justices at the heart of the crisis are perceived as being at opposing ends of Brazil’s polarized political spectrum. Next month, incumbent Luiz Inácio Lula da Silva is expected to face off with Sen. Flávio Bolsonaro, the son of former President Jair Bolsonaro, in what is likely to be a close election, as it was four years ago.The court is set to meet Tuesday to discuss whether one of the justices should be investigated for corruption.Here’s what to know.The chaos gripping the court stems from the collapse of Banco Master, a mid-sized bank worth up to $16 billion in assets, which was shut down last November after a sprawling investigation into a fraud scheme involving billions of reais. Several top politicians and members of the judiciary were linked to it.Justice Andre Mendonca, an appointee of former president Jair Bolsonaro, was in charge of the case at the Suprem...