How Flavio Bolsonaro Beat the Polls in Brazil's Presidential Race

Brazil's presidential election has entered a volatile runoff phase after Senator Flavio Bolsonaro defied pre-election surveys by finishing ahead of President Luiz Inacio Lula da Silva in the first round of voting. With roughly 47 percent of the vote to Lula's 45 percent, according to results reported after Sunday's ballot, the right-wing senator upended expectations that the incumbent would enter the second round with a modest lead of about three percentage points.

The outcome has unsettled analysts and triggered fresh debate about what the polling industry failed to capture in the campaign's closing days. A runoff had been widely anticipated, but few forecasters expected Bolsonaro to emerge as the frontrunner. With three weeks remaining until the decisive second round, Lula now faces a more difficult path than his team had planned for.

One explanation for the late swing centers on voters who had intended to support smaller right-wing candidates but chose to consolidate behind Bolsonaro earlier than usual. Carlos Pereira, a political scientist at the Getulio Vargas Foundation, a Brazilian think tank, said Bolsonaro had openly counted on this dynamic, telling reporters on election day that he expected a "protest vote" from citizens united mainly by their opposition to Lula.

Pereira noted that voters traditionally cast sincere ballots in the first round and strategic ones in the runoff. This time, however, supporters of figures such as Ronaldo Caiado, a former governor of Goias in central Brazil, and Renan Santos, a businessman who founded the right-wing Free Brazil Movement, appear to have made that strategic calculation weeks ahead of schedule. In Pereira's telling, their reasoning was simple: if they intended to back Bolsonaro in the second round anyway, there was little point in waiting.

That early consolidation carries consequences for the runoff. Political analyst Rafael Favetti told Reuters that some of the support Bolsonaro would ordinarily have gathered only between rounds had already been "front-loaded," which could leave him with less room to broaden his coalition in the coming weeks.

A second factor, according to Pereira, was the Banco Master scandal, a far-reaching alleged banking fraud that disrupted both campaigns in the final stretch and implicated figures across the political spectrum. Among those drawn into the controversy was Supreme Court Justice Alexandre de Moraes, who had overseen the case that sent former President Jair Bolsonaro, Flavio's father, to prison.

De Moraes faced accusations of improper ties to Daniel Vorcaro, the owner of Banco Master, after documents surfaced that appeared to show the banker seeking legal advice from the justice. De Moraes has denied the allegations. Pereira suggested the controversy may have served as a late trigger for some voters, particularly because Bolsonaro's supporters already viewed Moraes as an ally of Lula. Flavio Bolsonaro himself reinforced that perception on the campaign trail earlier this year, declaring that anyone voting for Lula was effectively voting for Moraes.

Public opinion data hinted at the damage. A September poll by Datafolha found that 34 percent of Brazilians associated the Banco Master scandal more with the left, while 27 percent linked it more with the right. Andre Pagliarini, a history and international studies professor at Louisiana State University and author of a book on Lula, agreed the affair may have harmed the president. He argued that a campaign defined by relentless scandal involving seemingly the entire political class played to Bolsonaro's strengths as an anti-institutional insurgent.

Pagliarini also pointed to an irony at the heart of the race: Flavio Bolsonaro himself was directly implicated in the Banco Master affair in ways Lula was not. The senator is under investigation over allegations that he sought money from Vorcaro to finance a film about his father. He denies any wrongdoing.

Neither expert interpreted the result as a straightforward failure of polling. For Pagliarini, the more striking development was the breadth of right-wing support, which extended far beyond the presidential contest. Bolsonaro outperformed his father's 2022 first-round result by nearly four percentage points, while his Liberal Party secured the largest bloc in Brazil's Senate. The right also performed strongly in gubernatorial races and posted significant gains in the country's southeast.

Pagliarini attributed part of that success to a potent information environment surrounding Flavio Bolsonaro's campaign, which allowed his messaging to remain in front of voters even as mainstream outlets reported scandal after scandal. In his assessment, the polls did not so much misread the race as underestimate the commitment of voters who were already leaning right.

Beyond the immediate horse race, the results expose a deeper challenge for Lula and the Brazilian left. Many voters appear unconvinced that the government is delivering enough, especially on the economy and public security. On paper, the administration can cite encouraging indicators, including record-low unemployment, declining inequality and easing inflation. Yet those statistics have not necessarily translated into a feeling that daily life is becoming more affordable.

Brazilians continue to report feeling squeezed by high food prices and mounting household debt, a disconnect that may be shaping their political choices more powerfully than macroeconomic data. A September survey by the polling firm Quaest found that nearly half of respondents believed the economy had gotten worse, underscoring the headwinds Lula faces as he tries to reverse the first-round result.

With the runoff approaching, the president must now confront a rival who has momentum, a consolidated right-wing base and an argument that the incumbent's economic record is not resonating with voters. Bolsonaro, meanwhile, must manage the flip side of his early consolidation: having already gathered much of the available anti-Lula vote, his challenge is to avoid stagnation and find new supporters in a polarized field.