Brazilian President Luiz Inácio Lula da Silva leads Senator Flávio Bolsonaro by 8.9 percentage points — down from 12.5 points in June — in a hypothetical presidential runoff, according to a CNT/MDA poll conducted August 5–9 across 140 municipalities. Lula (Brazil's two-round electoral system requires a runoff if no candidate clears 50% of valid votes in the first round, a scenario that has applied in every presidential election since 2002) holds 48% to Bolsonaro's 39.1% in that scenario, with the narrowing driven by a slight drop for the incumbent and a rise for the opposition candidate. The survey, released four days before official campaigning begins, underscores that Flávio Bolsonaro — son of former president Jair Bolsonaro, who is serving a 27-year sentence for attempting a coup — remains Lula's most competitive challenger ahead of the October election.