Lula and Flávio Bolsonaro face off in battle between leftwing incumbent and far-right son of jailed ex-presidentBrazilians go to the polls on Sunday in the first round of a highly polarised and high-stakes presidential election that could change not only the direction of Latin America’s largest country but that of the entire region.The election pits the leftwing president, Luiz Inácio Lula da Silva, who is seeking a fourth non-consecutive term, against the far-right senator Flávio Bolsonaro, an