BRASILIA (Reuters) - Brazil's President Dilma Rousseff has a clear lead of between 6 and 8 percentage points over her pro-business challenger Aecio Neves ahead of Sunday's presidential election runoff, two polls showed on Thursday.
In the first polls to show the leftist incumbent with a lead greater than the margin of error, Rousseff has 49 percent of voter support against 41 percent for Neves in a survey by the Ibope research firm, while a Datafolha survey showed her winning by 48 percent against 42 percent for Neves.
Excluding undecided voters, spoiled and blank survey responses, Rousseff would win Sunday's runoff by 54 percent of the valid votes against 46 percent for Neves, according to Ibope. Datafolha shows Rousseff winning by 53 percent versus 47 percent for Neves.
Both polls have a margin of error of plus or minus 2 percentage points.
Ibope interviewed 3,010 voters between Oct. 18 and 23 for a poll commissioned by the Globo media group and the Estado de S.Paulo newspaper. Datafolha interviewed 9,978 voters Wednesday through Thursday for a poll commissioned by the Folha de S.Paulo newspaper.
(Reporting by Anthony Boadle; Editing by James Dalgleish)