Brazil's presidential candidates: Marina Silva of the Brazilian Socialist Party (left) and the incumbent Dilma Rousseff of the Workers' Party. Photos: Reuters

Brazil poll shows Rousseff catching up with Silva in potential presidential run-off vote

Opinion poll ahead of October 5 presidential elections sees incumbent Dilma Rousseff resurgent against left-wing challenger Marina Silva

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Brazil's presidential candidates: Marina Silva of the Brazilian Socialist Party (left) and the incumbent Dilma Rousseff of the Workers' Party. Photos: Reuters
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