Brazil's Presidential Candidates Prepare for First Debate Ahead of Election

• Brazilian supporters held rallies for presidential candidates on Sunday.
• Leftist President Luiz Inacio Lula da Silva and right-wing Senator Flavio Bolsonaro are preparing for their first televised debate.
• The debate is scheduled to occur just one week before the election.
• The campaign period is nearing its end with the debate as a key event.
• The event is expected to influence voter decisions in the upcoming election.