World

Brazil presidential contenders set for final debate; polls say Rousseff is holding on to lead

  • Children walk past a a campaign poster for Brazil's President Dilma Rousseff, who is running for reelection with the Workers Party (PT), ahead of general elections in the Sol Nascente neighborhood of Brasilia, Brazil, Thursday, Oct. 2, 2014. Brazil will hold general elections on Oct. 5. (AP Photo/Eraldo Peres)

    Children walk past a a campaign poster for Brazil's President Dilma Rousseff, who is running for reelection with the Workers Party (PT), ahead of general elections in the Sol Nascente neighborhood of Brasilia, Brazil, Thursday, Oct. 2, 2014. Brazil will hold general elections on Oct. 5. (AP Photo/Eraldo Peres)  (The Associated Press)

  • A campaign poster for presidential hopeful Marina Silva, with the Brazilian Socialist Party presidential candidate, stands along an avenue ahead of general elections in Brasilia, Brazil, Thursday, Oct. 2, 2014. Brazil will hold general elections on Oct. 5. (AP Photo/Eraldo Peres)

    A campaign poster for presidential hopeful Marina Silva, with the Brazilian Socialist Party presidential candidate, stands along an avenue ahead of general elections in Brasilia, Brazil, Thursday, Oct. 2, 2014. Brazil will hold general elections on Oct. 5. (AP Photo/Eraldo Peres)  (The Associated Press)

  • Members of the Workers Party (PT) sit in front of a wall covered by a mural featuring Brazil's President Dilma Rousseff, who is running for re-election, candidate for governor Agnelo Queiros, center, and fromer President Luiz Inacio Lula da Silva at a local PT election committee headquarters in the Ceilandia neighborhood of Brasilia, Brazil, Thursday, Oct. 2, 2014. Brazil will hold general elections on Oct. 5. (AP Photo/Eraldo Peres)

    Members of the Workers Party (PT) sit in front of a wall covered by a mural featuring Brazil's President Dilma Rousseff, who is running for re-election, candidate for governor Agnelo Queiros, center, and fromer President Luiz Inacio Lula da Silva at a local PT election committee headquarters in the Ceilandia neighborhood of Brasilia, Brazil, Thursday, Oct. 2, 2014. Brazil will hold general elections on Oct. 5. (AP Photo/Eraldo Peres)  (The Associated Press)

Brazil's presidential candidates are set for their final debate before this weekend's election.

The top two challengers to President Dilma Rousseff are expected to go on the attack against her as she's solidified her recent lead in the polls.

A Datafolha poll released Thursday night says Rousseff leads top challenger Marina Silva 48-to-41 when voters were asked who they would support in a runoff. An Ibope Institute survey puts Rousseff ahead of Silva 43-to-36 in the same scenario.

Rousseff trailed Silva by 10 percentage points just a month ago.

The president's Workers Party has used its deep pockets and highly organized apparatus nationwide to attack Silva's record as a senator and question whether she has the mettle to lead the globe's seventh-largest economy.