In last week's Datafolha poll, Lula's lead was also six percentage points. According to its own statements, the institute also took into account voters who wanted to submit an empty or invalid ballot paper. Their share of those surveyed was five percent this week. A total of 2,898 citizens were asked about their intention to vote on Thursday and Friday.
Before the first round of elections on October 2, however, the polling institutes in Brazil underestimated support for Bolsonaro. They predicted about 37 percent of the vote for him, but he actually got 43 percent. Lula got 48 percent of the vote in the first ballot.
The Board of Economic Defense, a body that oversees free economic competition in Brazil, also launched an investigation into possible manipulation by the polling institutes. TSE President Alexandre de Moraes also suspended this investigation. As a reason, he explained that such investigations are the responsibility of the electoral judiciary. They would also amount to a will to favor the candidacy of the incumbent president.
Bolsonaro criticized de Moraes' intervention. "The poll makers will continue to lie and how many votes will go to the other camp with these lies?" he said in an interview. Finally, voters "generally voted for whoever wins".