Brazilian socialist President Luiz Inácio Lula da Silva and right-wing Senator Flávio Bolsonaro are virtually tied as August comes to a close, according to UBS analysts citing new polling data, turning October's presidential election into a potential coin toss. A Bolsonaro victory would accelerate the eradication of left-wing rule across South America as the continent undergoes a once-in-a-generation rightward political realignment.