Flávio Bolsonaro Leads Incumbent Lula in First-Round Vote to Force Presidential Runoff

Brazilian electoral law requires a presidential candidate to secure more than 50 percent of valid votes to win outright. On Sunday, neither of the leading candidates cleared that threshold, forcing a runoff between right-wing Senator Flávio Bolsonaro and incumbent President Luiz Inácio Lula da Silva.[2]

With 99.9 percent of the ballots counted, Bolsonaro captured 47 percent of the vote, representing 56.1 million ballots. Lula finished second with 45.1 percent, or 53.8 million votes.[1]

The two men will face each other in a second round of voting scheduled for October 25. The margin of roughly 2.3 million votes defied pre-election polling, which had consistently projected a narrow first-round lead for the 80-year-old incumbent.[1][2][3]

Defying the polls

Instead, the 45-year-old Bolsonaro capitalized on public frustration over the cost of living and urban violence to secure the top spot. He was a relatively low-profile senator until his father, former President Jair Bolsonaro, anointed him as his political heir.[1][3]

The elder Bolsonaro is currently serving a 27-year prison sentence for attempting a coup after losing the 2022 election, leaving his son to lead the conservative ticket. Speaking to supporters in Brasília, Flávio Bolsonaro celebrated the strong turnout and framed the results as a definitive shift in the country's political landscape.[1][3]

"Lula has fought seven presidential elections. He's worried about power. I am worried about the future of Brazil," Bolsonaro said. In São Paulo, Lula acknowledged that the night had been difficult for his Workers' Party and that the outcome fell short of his expectations.[1][2]

"The result is often unexpected. One never gets everything one wanted," Lula told the crowd. He declared that a new campaign would begin immediately, warning voters that a victory for his opponent would bring profound uncertainty to the nation.[2]

A conservative wave

The right-wing surge extended far beyond the presidential race, fundamentally reshaping the balance of power in the national legislature. Conservative parties, led by Bolsonaro's Liberal Party, are on track to secure majorities in both the Senate and the Chamber of Deputies.[2][3]

The Bolsonaro family secured several high-profile victories across the country. Michelle Bolsonaro, the former first lady and Flávio's stepmother, won a Senate seat representing the Federal District.[1][3]

His brothers, Carlos and Jair Renan, also won seats in the Senate and the lower house, respectively. In São Paulo, Brazil's most populous and economically vital state, former infrastructure minister Tarcísio de Freitas was reelected as governor.[1]

Of the 54 Senate seats contested on Sunday, 34 were won by candidates aligned with the right or far-right. The Senate results carry immense political weight because senators hold the exclusive power to impeach Supreme Court justices.[1]

The battle for the center

Removing specific justices has been a central demand of the Bolsonarista base since the court convicted the former president of election interference. The candidates now have three weeks to court the roughly 8 percent of voters who backed third-party options.[1]

The runoff will test whether Lula can consolidate moderate support or if the conservative momentum will carry Bolsonaro to the presidency. Bolsonaro enters the second round as the strong favorite, largely because the eliminated candidates lean to the right.[1][3]

Ronaldo Caiado secured 2.1 percent of the vote, while Renan Santos won 2.2 percent, and their supporters are widely expected to migrate to the Bolsonaro camp. Both finalists carry extremely high rejection rates in a deeply polarized electorate.[1][3]

Lula retains strong support in Brazil's poorer northeast and among voters who credit his social welfare programs with lifting millions out of poverty during his previous terms. However, many voters expressed a desire for immediate economic change.[1][3]

International implications

Shop assistant Italo Andrade dos Santos, a 31-year-old Bolsonaro voter, said he cast his ballot "more to get Lula out than for Flávio himself," reflecting a broader anti-incumbent sentiment. The election is being closely monitored abroad, as the outcome will dictate the foreign policy of Latin America's largest economy.[1][4]

Lula has prioritized multilateral trade and deepened ties with China, while a Bolsonaro victory would likely align Brazil more closely with the United States. Despite the ideological alignment, U.S. President Donald Trump has so far declined to endorse Bolsonaro.[2][4]

This marks a departure from Trump's recent practice of backing conservative candidates in Argentina, Chile, and Colombia. "I'm following it very closely. It's a very important country. The people of Brazil are fantastic. It's a very important election," Trump said on Thursday.[4]

The diplomatic backdrop remains tense following recent U.S. tariffs on Brazilian goods and sanctions against officials involved in the elder Bolsonaro's trial. In August, the Brazilian Intelligence Agency raised the risk of U.S. interference in the election to a "critical level" in a classified report.[4]

With the October 25 runoff approaching, the campaigns will now focus entirely on mobilizing the 21 percent of eligible voters who abstained from the first round. The winner will take office on January 5, inheriting a divided nation and a complex economic landscape.[1][2]