Analysis of information sources in references of the Wikipedia article "Democratic Labour Party (Brazil)" in English language version.
Silva had been a member of PT since 1985, while Rousseff, who had been a founding member of Brizola's social-democratic PDT, joined PT only in 2001.
The next closest candidate, Ciro Gomes of the centre-left Democratic Labour party, is polling at about 7-8 per cent.
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