Unger served as Brizola's campaign organizer and primary political adviser in his bids for the Brazilian Presidency in 1989 and 1994. In 1989, Brizola finished in third place, losing the second position, which would have qualified him for a runoff against Fernando Collor de Mello, by a very narrow margin to Luiz Inácio Lula da Silva. Brizola and Unger both supported Lula in the second round of the election, but Collor would go on to beat Lula and win the Presidency.