Over the weekend, social media exploded over a video of comments made in July by Eduardo Bolsonaro saying the top court could be forcibly disbanded by the Army if it stripped his father of an electoral victory.
Chief Justice José Antonio Dias Toffoli issued a statement saying that any attack on the judiciary amounted to an attack on democracy and urged all authorities to respect the constitution.
Bolsonaro's leftist rival, Fernando Haddad, who is trailing in opinion polls, said if the former Army captain wins Sunday's run-off vote, military hard-liners will threaten democratic institutions and undermine the country's young democracy. Brazil emerged in 1985 from a repressive 21-year military dictatorship.
Following the firestorm, Bolsonaro, a federal lawmaker, expressed his respect for the separation of powers and disowned the comments by his son, a 34-year-old member of Congress.