It's a nail-biter of an election -- and polls show Brazilian President Dilma Rousseff has clawed her way back into the lead.<br/> <br />She cast her ballet, Sunday, as more than 140 million registered voters head to the polls.<br/> <br />Her main competition -- Marina Silva who was thrust into the spotlight after Brazil's Socialist Party's original candidate was killed in a plane crash.<br/> <br />She tapped into the anti-establishment mood on the streets -- one that saw mass protests erupt over employment laws, health and education.<br/> <br />Just behind Silva, is Aecio Neves -- a senator and former state governor from the centrist party, running on a pro-business platform.<br/> <br />Both Silva and Neves want reforms to the tax system -- to lower the cost of doing business in Brazil.<br/> <br />But do they have enough support to unseat Rousseff, who is highly popular with the working class?<br/> <br />Despite a weak economy, unemployment remains near a record low... and this, could be enough to swing voters her way.
