(MENAFN- The Peninsula) Leftist incumbent Dilma Rousseff and Social Democratic challenger Aecio Neves are fighting to break a statistical tie in the polls a week out from next Sunday's presidential runoff.
The contest has developed into the closest-fought in a generation as Neves looks to unseat Rousseff, whose Workers Party (PT) has been in power for 12 years.
Having unexpectedly thrashed environmentalist Marina Silva in the first round, Neves, former governor of southern Minas Gerais state, has his nose just in front, polls say.
But his advantage going into this weekend was wafer-thin at 51 percent to 49, leaving him and Rousseff in a virtual dead heat.
The past week has seen Neves 54, and Rousseff, 66, engage in caustic debate with both accusing the other of lying and turning a blind eye to graft, a key issue in the debate amid a kickbacks scandal involving oil giant Petrobras.
While insisting he will keep in place extensive PT welfare reform programs after they pulled millions out of poverty in the past decade, Neves has accused Rousseff's administration of failing on the economy by leading it into recession this year.
Rousseff's four years have been marked by low growth which had raced ahead under predecessor Luiz Inacio Lula da Silva.
With the Petrobras scandal also haunting her administration - though his own party has not escaped allegations of wrongdoing - Neves insists that "Brazil cannot take another four years of misgovernment on this scale."
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