Lula and Flávio Bolsonaro Trade Graft Accusations in Runoff Clash

The escalating "Caso Master" banking scandal has become the central battleground of Brazil's presidential runoff, directly threatening both candidates with allegations of illicit financial ties. Just weeks before the October 25, 2026, second-round vote, left-wing President Luiz Inácio Lula da Silva and his right-wing challenger, Senator Flávio Bolsonaro, are trading heavy accusations of corruption. The political crisis centers on Daniel Vorcaro, the jailed former owner of Banco Master, who is accused of orchestrating one of the largest financial fraud schemes in Brazil's history.

On October 11, 2026, Brazil’s Superior Electoral Court (TSE) stepped directly into the fray. TSE President Kassio Nunes Marques ordered the immediate suspension of a prime-time television campaign ad by Lula’s team. The ad accused Flávio Bolsonaro—the eldest son and political heir of jailed former President Jair Bolsonaro—of laundering money and taking bribes through Banco Master. Nunes Marques ruled that the campaign piece presented criminal accusations without a "minimum baseline of evidence," ordering its removal to preserve electoral fairness.

The judicial intervention followed a explosive report by Veja magazine on October 9, 2026, which published leaked audio of Vorcaro. In the recording, the former banker claimed he paid R$ 30 million ($5.4 million) in cash to the Lula Institute to finance a 2024 documentary about Lula by American filmmaker Oliver Stone. According to the report, the illicit payments were meant to secure Banco Master lucrative access to state-owned pension funds. However, both the Federal Police (PF) and the Prosecutor-General’s Office (PGR) swiftly issued statements denying that Vorcaro had ever formalised these specific claims or delivered supporting documents during his failed plea bargain negotiations. Lula's campaign vehemently rejected the Veja report, calling it an unproven "farce" designed to disrupt the election.

Meanwhile, Flávio Bolsonaro remains under active federal investigation for his own deep ties to the jailed financier. Leaked audio messages published by The Intercept Brazil earlier this year revealed the senator directly soliciting up to R$ 134 million ($24 million) from Vorcaro to finance Dark Horse, a biographical film celebrating his father, Jair Bolsonaro. Federal investigators are currently probing whether these funds were laundered through a U.S.-based entity to bypass campaign finance laws and support the Bolsonaro family's political operations. Flávio has admitted to contacting Vorcaro but denies any public funds were misused.

The scandal has also deeply entangled Brazil’s Supreme Court (STF). Leaked messages from Vorcaro’s phone have exposed extensive communications with key judicial figures, including Justice Alexandre de Moraes and even TSE President Nunes Marques himself, raising concerns about the bank's influence over high-level judicial decisions. With polls showing a neck-and-neck race, the "Caso Master" has shifted the election from a debate over the economy to a mudslinging match over who is more compromised by Brazil's financial underworld.