New Delhi, Oct. 8 -- "The right mixes religion and faith, whereas I think those things should be separate, while (Lula's) Workers' Party has robbed the country," said Bon Raggio, a 19-year-old studying theater in Rio de Janeiro, while walking around a shopping mall in downtown Rio. "I'm very undecided."

Her distrust is rooted in history: Bolsonaro is under investigation for corruption and Lula was jailed for 19 months on corruption and money laundering charges that were later annulled. Bolsonaro's father, former president Jair Bolsonaro, is currently serving a 27-year sentence for planning a coup after his 2022 defeat to Lula.

As the second round nears, both Lula and Bolsonaro are hyperfocused on winning over undecided voters such as Bo...