Lula da Silva has been declared the winner of the Brazilian election, in a result that will send shockwaves throughout South America .

The left-wing candidate defeated Senator Flavio Bolsonaro, the eldest son of former President Jair Bolsonaro. The senator had finished first in the election's first round and hoped to revive his father's far-right movement.

At times, Lula's reelection looked like a long shot, as voters soured on him and his Workers' Party after years of corruption scandals and rising prices , while sweeping societal changes left the former metalworker and union leader looking out of touch with an increasingly app-based economy and its growing ranks of informal workers .

Lula's victory marks another comeback in a career full of them.…