OPINION: Brazilian presidential elections are shaping up to be a highly-polarised affair, with voters split between choosing to keep incumbent Jair Bolsonaro in power, with an agenda that is right-wing populist on social issues but has offered little in the economic field, or switch back to charismatic left-wing populist leader Luiz Inacio Lula da Silva.

Recent polls suggest that Lula is leading by a wide margin, capturing nearly 50% of voters' intentions, and even though the man who led Brazil for two terms has yet to formalise his official nomination for the job, he is clearly close to making the move to cement his position.