According to the Folha de Sao Paulo, the polling company Ibope reports that the incumbent, Marta Suplicy now almost level-pegging with Jose Serra in the race for Sao Paulo mayor. Serra is on 22% and Marta on 21%, a slump in Serra's case since a May poll showed him well in front.
However, and perhaps of greater importance, is the proportion of the electorate who would reject him. He currently generates lower level of apathy, with only 42% of the polled saying they wouldn't vote for him. This compares to 62% for Marta. Of course she has a record to run on, while Serra hasn't been health minister for two years now.