Watch VideoPlay Video
Brazil's presidential race entered a crucial phase on Tuesday as the candidates launched their radio and television campaigns.
The ruling party's Dilma Rousseff has raced to her biggest lead in the polls raising the odds she'll become Brazil's first woman president.
The TV exposure will show Rousseff is backed by Brazil's hugely popular outgoing President Luiz Inacio Lula da Silva.
For the main opposition candidate, Jose Serra, the TV campaign is a chance to connect with voters and remind them of his vast experience as an executive.
Marina Silva of the Green Party trails a distant third and offers voters "the third road".