Lula and Flávio Bolsonaro Clash in First Debate of Brazil's Runoff Race

The debate, hosted by Band at the network's São Paulo studios, was the first time the two candidates appeared on the same stage during the 2026 presidential campaign, according to CNN Brasil and the Rio Times Online.

First Face-to-Face of the Runoff

The program started at 8 p.m. Brasília time and was expected to run about two hours, ending around 10 p.m., Exame reported; Rio Times Online put the broadcast's length at roughly one hour and 45 minutes. It was carried on Band's television, radio and digital platforms, Rio Times Online reported.

Attendance was briefly in doubt. Lula confirmed he would take part on Tuesday, October 13, while Flávio initially said he would skip the debate the same day before reversing his decision on October 14 in a video posted on the social platform X, Rio Times Online reported.

A Razor-Thin First Round

Neither candidate won a majority in the October 4 first round, triggering the runoff. Flávio took 47% of valid votes, about 56 million, against Lula's 44.9%, roughly 53 million, according to Al Jazeera. Pre-election polling had generally pointed to a Lula lead in the first round, making Flávio's result an outperformance, political analyst Rafael Favetti told Al Jazeera, adding that "protest votes" may have shifted earlier than expected.

The right also made gains in Congress: Michelle Bolsonaro, the former first lady, won a Senate seat in the Federal District, and Carlos Bolsonaro won a Senate seat in Santa Catarina, Al Jazeera reported. Flávio's father, former president Jair Bolsonaro, is serving a 27-year prison sentence over a plot to overturn the 2022 election result, the outlet noted. Two eliminated first-round candidates, Ronaldo Caiado and Renan Santos, together drew about 5.3 million votes and had not endorsed either finalist, leaving their supporters as a contested bloc heading into the runoff.

Strategies Heading Into the Debate

Flávio's team limited formal debate rehearsal, instead keeping him on the campaign trail with rallies in Vitória and Salvador on Saturday and a right-wing gathering in São Paulo on Sunday before the broadcast, CNN Brasil reported. His campaign built its message around the economy and public security, centering attacks on Lula over the cost of living, while seeking to counter claims that he would cut social programs by framing his proposals as helping recipients become "independent" of state benefits, per CNN Brasil.

Lula spent the full weekend preparing with aides, aiming for what his campaign described as a "forward-looking tone," CNN Brasil reported. His strategy centered on comparing his record with the Bolsonaro years, defending his current term and presenting proposals for a fourth term. Aides also prepared lines attacking Flávio's proposed "Tesouraço," a package of budget cuts, drawing a comparison to austerity measures under Argentine President Javier Milei. According to CNN Brasil, Lula's team also planned to raise what it called "contradictions" in Flávio's record, including his reported ties to lawyer Willer Tomaz, who is under investigation over alleged fraud involving Brazil's social security institute, INSS; Tomaz has not been convicted in the case.

What the Numbers Say

Surveys taken ahead of the debate showed a close but generally Flávio-leaning race, while two online prediction markets gave him a wider edge. Exame reported several poll results and an average compiled by Inteligov; Rio Times Online cited betting data from Polymarket and Kalshi.

Rio Times Online reported that the debate was moderated by journalists Adriana Araújo and Eduardo Oinegue, and described the broadcast's format as putting the direct clash between the two finalists ahead of a simple exchange of attacks.

A second and final televised debate is scheduled on TV Globo on October 23, two days before the October 25 runoff vote decides Brazil's next president.