Overview
- Multiple national polls published Monday showed an extremely close runoff with BTG/Nexus reporting 50.3% for Flávio Bolsonaro and 49.7% for Luiz Inácio Lula da Silva and other surveys from Atlas/Bloomberg and Futura also placing the gap inside or near sampling error.
- A PoderData/Aya poll was an outlier with Bolsonaro at 52% and Lula at 48%, and pollsters note differences in fieldwork dates and the use of votos válidos when comparing results.
- The first televised debate increased public uncertainty and drew mixed analyst judgments but most of the Monday polls completed fieldwork before or during the broadcast so their shifts cannot be reliably credited to the debate.
- Pollsters warn that higher abstention among lower-income voters could disproportionately hurt Lula because his support is concentrated in that group, and Nexus director Marcelo Tokarski highlighted that turnout patterns are a structural risk for the incumbent.
- Although about 90.9% of voters say they have decided their choice, roughly 8% remain persuadable and a second debate on Friday and last-minute mobilization could tip the outcome given sharp regional, gender and religious divides in support.