A poll conducted by the Public Opinion and Statistics Institute (IBOPE) shows that candidate Dilma Rousseff of the Workers' Party (PT) holds 38% of the voting intentions for president.Second to her comes Aécio Neves of the Brazilian Social Democracy Party (PSDB), with 22%, and Eduardo Campos of the Brazilian Socialist Party (PSB) comes next with 8%.

Commissioned by Globo TV network and newspaper O Estado de S. Paulo, the poll has a margin of sampling error of plus or minus 2 percentage points.

The other eight candidates had a combined 7% of votes. At least 16% of respondents said they would vote blank or spoil the ballot. And 9% declined to answer or are not sure who they are voting for.

IBOPE has also simulated runoff scenarios. In the event of a contest between Dilma Rousseff and Aécio Neves, Rousseff would have 41% of votes, and Neves, 33%. Blank and spoilt ballots would account for 18%, whereas 8% of respondents declined to answer or were undecisive. In a Rousseff vs Campos scenario, Rousseff would be re-elected with 41% of votes, and Campos would have 29%. Blank and spoiled would amount to 20%, and unsure/no answer, 10%.

The institute has also published Rousseff's government ratings, and the results were as follows: approvals totaled 31% in July, the same as in June; “neutral” ratings accounted for 36% in July, up from 33% in June; and disapprovals remained stable at 33%. In both months, 1% of respondents declined to answer or were not sure what to say.