Navarrese People's Union
The Spanish Socialist Workers' Party (PSOE), under then-incumbent President Gabriel Urralburu, won the election for a second consecutive term, albeit with a diminished share of the vote (27.7%, losing nearly 8 percentage points from 1983) and losing 5 seats. The centre-right spectrum stood divided to the election: the Navarrese People's Union (UPN) maintained its second place with 24.5% and 14 seats (gaining one); the Foral Democrat Union (UDF), an alliance between the People's Democratic Party (PDP) and the Liberal Party (PL), formed after the breakup of the People's Coalition, obtained 6.2% and 3 seats. The People's Alliance (AP) suffered from this division and fell to 7th place (4.2% and 2 seats).