Brazilians vote on Sunday in one of the closest presidential runoffs in the country's modern history, choosing between the leftist incumbent, Luiz Inácio Lula da Silva, and right-wing Senator Flávio Bolsonaro, after a first round that upended expectations and a final week of polling that neither campaign can comfortably read.
The runoff was forced after the October 4 first round, in which Bolsonaro finished first with 47.03 percent of valid votes against Lula's 45.16 percent, according to the Organization of American States observer mission — a surprise, given that pre-election surveys had consistently projected an advantage for the sitting president. Neither candidate cleared the 50 percent threshold needed to win outright.
The race has only tightened since. A Quaest survey published on Wednesday put Bolsonaro at 45 percent and Lula at 44 percent, within the poll's two-point margin of error. A Nexus poll commissioned by BTG Pactual had Bolsonaro at 46.5 percent to Lula's 45.9 percent — 50.3 to 49.7 in valid votes — while an AtlasIntel/Bloomberg poll gave Bolsonaro 49.8 percent against 47.6 percent. Every major survey agrees on one thing: the gap has shrunk, and the election will be decided by a sliver of late-deciding voters.
A family name against a political era
Flávio Bolsonaro is the eldest son of former President Jair Bolsonaro, who is under house arrest serving a 27-year sentence after being convicted of attempting to overturn the result of the 2022 election, which Lula won narrowly. The senator has campaigned on public security, economic liberalism and his father's political brand, while keeping the former president himself — still the most polarising figure in Brazilian politics — at the centre of his pitch to conservative voters.
Lula, who turns 81 this month, is seeking an unprecedented fourth non-consecutive term. One of the most durable figures in Latin American politics, he has campaigned on the cost of living, social programmes and his government's environmental record, which received a late boost this week when data showed deforestation in Brazil's Amazon had fallen 42 percent from a year earlier, to its lowest level on record. The two men traded sharp attacks in a fiery first runoff debate, with the economy, crime and corruption dominating the exchanges.
Why it matters
Brazil is Latin America's largest country and economy, a major agricultural exporter and a central voice in global climate negotiations. Sunday's result will shape its relationship with Washington, the future of Amazon protection, and the balance between social spending and fiscal restraint for the next four years. It is also a test of democratic resilience: the election is being held in the shadow of the elder Bolsonaro's conviction for plotting against the 2022 result, and electoral authorities have been on alert for disinformation and challenges to the count.
What happens next
Polls close on Sunday evening and Brazil's electronic voting system usually produces a result within hours. The winner takes office on January 1 and inherits an economy where voters rank prices and public safety above all else — the two issues that defined the campaign and that will define the next government from its first week.
*Reporting based on Reuters polling coverage and Al Jazeera.*