Socialist politician Eduardo Campos and the six other people aboard the aircraft died in the accident yesterday, which came less than two months ahead of the October 4 presidential election.
President Dilma Rousseff, who opinion polls say leads the race, declared three days of official mourning for Campos and said she was suspending her campaign during that time. The other main candidate, Aecio Neves, also said he was putting his campaign on hold.
The 49-year-old scion of a powerful political family from the northeastern state of Pernambuco, Campos was a fixture on the Brazilian political scene since his youth, having served as state and federal representative and also as Pernambuco's governor.
He had been allied with Rousseff and her Workers Party but broke away ahead of the presidential campaign. Opinion polls had said Campos was running in third place, behind Rousseff and Neves.
Aeronautical officials said the plane was trying to land in bad weather, although the Globo television network broadcast interviews with witnesses who said the aircraft was in flames before it crashed among apartment buildings. An investigation has been opened to determine the exact cause, Brazil's aeronautical agency said.
The accident sent shock waves through Brazil's political class and had pundits speculating about how it might affect the election.
