The Portuguese legislative election of 1979 took place on 2 December. The last election, three and a half years before, in April 1976, was won by the Socialist Party under the lead of Mário Soares, who became the Prime-Minister of the 1st Constitutional government after the revolution. However, the government suffered several attacks and in December 1977, Soares lost the voting of a confidence resolution because all the opposition, the Democratic and Social Center, the Social Democrats and the Communists united in order to vote against it, and so, the Soares' government fell. Soares would become Prime-Minister again in January 1978, in coalition with the Democratic Social Center, but in July this party would force the end of the government due to disagreements about agrarian reform. In August, Nobre da Costa became Prime-Minister by personal decision of the President of President Ramalho Eanes, after a failed attempt to unite the parties on the Parliament. However, the program of Nobre da Costa's government was never approved and two months later, da Costa was replaced by Mota Pinto who would govern with extreme difficulties for less than one year. In July 1979, the President finally decided to dissolve the Parliament and call for a new election for December. Mota Pinto was replaced in the period between the dissolution and the election by Maria de Lourdes Pintasilgo. The right-wing parties, the Social Democratic, the Democratic and Social Center and the People's Monarchist Party united in the Democratic Alliance under the lead of Sá Carneiro won the election, receiving 43% of the vote. The Socialists lost more than 30 MPs and the Communists, now allied with the Portuguese Democratic Movement in the United People Alliance achieved their highest total ever, with almost 20% of the voting.
Electoral system
The Assembly of the Republic has 250 members elected to four-year terms. The total number of MPs was reduced to 250 from the previous 263, elected in 1976. Governments do not require absolute majority support of the Assembly to hold office, as even if the number of opposers of government is larger than that of the supporters, the number of opposers still needs to be equal or greater than 126 for both the Government's Programme to be rejected or for a motion of no confidence to be approved. The number of seats assigned to each district depends on the district magnitude. The use of the d'Hondt method makes for a higher effective threshold than certain other allocation methods such as the Hare quota or Sainte-Laguë method, which are more generous to small parties.
Parties
The major parties involved and the respective leaders:
