Dilma Rousseff (L)
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Brazil to elect Dilma Rousseff as first woman president?

Polls predict voters in Brazil are poised to elect the country's first female president, although Dilma Rousseff's poll lead has narrowed.

That could lead to a second round of voting if there is no clear winner.

Some 135 million voters are going to the polls to elect a successor to President Lula da Silva, who is barred by the constitution from running for a third term.

Ashleigh Nghiem reports.