The election was held after the referendum on Spanish membership in NATO in March 1986 had resulted in a surprising win for the 'In' camp headed by Prime Minister Felipe González. Reinforced from the referendum result, the Spanish Socialist Workers' Party (PSOE) sought to take advantage of the favorable political situation. The election resulted in the PSOE winning a second consecutive—albeit diminished—majority with 184 out of 350 seats. Its immediate competitor, Manuel Fraga's People's Coalition, an electoral alliance formed by People's Alliance (AP), the People's Democratic Party (PDP) and the Liberal Party (PL), remained stagnant with a similar result to the one obtained in 1982 by the AP–PDP coalition. The disappointing election result caused the Coalition to break apart shortly afterwards.