Brazilian Socialist Party member Marina Silva would enter the presidential race in second place in voter preferences behind incumbent President Dilma Rousseff, according to a poll published by the Folha de S. Paulo newspaper.  The poll showed Ms. Silva with support from 21% of respondents, while Ms. Rousseff had 36%. Brazilian Social Democratic Party candidate Aecio Neves had support from 20% of respondents. The socialist party, known as the PSB, is scheduled to deliberate this week on whether Ms. Silva will be its candidate to substitute former Pernambuco governor Eduardo Campos, who died last week in a plane crash.  Ms. Silva, who had been chosen as the vice-presidential running mate to Mr. Campos, took 20% of the vote in the first round of presidential elections against Ms. Rousseff in the country’s 2010 elections, as a candidate for the Green Party.  The latest poll showed Ms. Silva would take 43% of the vote in a runnoff elections against 47% for Ms. Rousseff. Mr. Neves would garner 39% in a runnoff election compared to 47% for Ms. Rousseff. Brazil’s first round presidential election is scheduled to be held on Oct. 5. If no candidate takes more than 50% of the vote, a runoff election will be held.