Far-right President Jair Bolsonaro and his leftist front-running challenger Luiz Inacio Lula da Silva formally launched their campaigns on Tuesday for Brazil's most polarized elections in decades in October.
The race pits a nationalist populist with an agenda backed by Christian conservatives against a former union leader and two-term president of the country (2003-2010) who was jailed for corruption until his convictions were annulled.
