By the 1983 local election, the party increased by 1% in the municipal and 0.9% in the county election. According to an opinion poll done in early September, the Labour Party would lose four of its Oslo representatives in parliament to the Progress Party, Conservative Party, and the Socialist Left. If the 1983 local election had been a parliamentary election, the Socialist Left would have received 8 seats in parliament. The party earned 5.5% and 5.7% in the county and municipal elections in 1987 respectively. The party's strongest county was Nordland, where the party gained 21.9% of the popular vote.