Datafolha

Still, IBOPE and Datafolha, two of the large political polling firms, claim to have factored in the intentions of these voters and in this demolition derby -- which Lula says has been the dirtiest campaign he's seen since Brazil returned to democracy -- predict that the winner will be the name at the top of the #13 ticket, Dilma.

Eric Ehrmann: October Surprises Bring Drama to Brazil's Presidential Race Eric Ehrmann 2010

Still, IBOPE and Datafolha, two of the large political polling firms, claim to have factored in the intentions of these voters and in this demolition derby -- which Lula says has been the dirtiest campaign he's seen since Brazil returned to democracy -- predict that the winner will be the name at the top of the #13 ticket, Dilma.

Eric Ehrmann: October Surprises Bring Drama to Brazil's Presidential Race Eric Ehrmann 2010

Some one million voters abandoned her for religious reasons, according to a Datafolha survey.

Brazil Vote's Winners: Evangelicals John Lyons 2010

Still, IBOPE and Datafolha, two of the large political polling firms, claim to have factored in the intentions of these voters and in this demolition derby -- which Lula says has been the dirtiest campaign he's seen since Brazil returned to democracy -- predict that the winner will be the name at the top of the #13 ticket, Dilma.

Eric Ehrmann: October Surprises Bring Drama to Brazil's Presidential Race Eric Ehrmann 2010

More photos and interactive graphics Former cabinet minister Dilma Rousseff is expected to win the run-off, with pollster Datafolha projecting a 56% to 44% spread against former S ã o Paulo Gov.

Brazil Vote's Winners: Evangelicals John Lyons 2010

Since the scandal broke, Ms. Silva has gained 3 percentage points to 14%, according to Datafolha.

Brazil Corruption Scandal Clouds Presidential Vote John Lyons 2010

Given the poll's two-percentage-point margin of error, "it would be impossible to indicate a [Rousseff] victory in the first round, in event that the elections were now," Datafolha wrote in an analysis of its results.

Brazil Corruption Scandal Clouds Presidential Vote John Lyons 2010

In the week before Oct. 21, according to a survey by the Datafolha polling institute, support for Mr. Serra slipped from a previous poll while Ms. Rousseff advanced, taking 50% of the intended vote, compared with Mr. Serra's 40%.

Brazil Challenger's Chances Dim Paulo Prada 2010

A Datafolha poll released Tuesday showed Ms. Rousseff lost three percentage points in just five days, to 51% support.

Brazil Corruption Scandal Clouds Presidential Vote John Lyons 2010

Still, IBOPE and Datafolha, two of the large political polling firms, claim to have factored in the intentions of these voters and in this demolition derby -- which Lula says has been the dirtiest campaign he's seen since Brazil returned to democracy -- predict that the winner will be the name at the top of the #13 ticket, Dilma.

Eric Ehrmann: October Surprises Bring Drama to Brazil's Presidential Race Eric Ehrmann 2010