The election was won by the Spanish Socialist Workers' Party (PSOE), which gained 2 seats and enlarged its absolute majority from 52% to 53% of the seats; Castilla–La Mancha thus became one of the few autonomous communities in the 1987 regional elections where the PSOE increased its parliamentary representation. The People's Alliance (AP), on the other hand, won just 34% of the share and 18 seats, after the People's Coalition had broken up in 1986. Both former AP partners, the People's Democratic Party (PDP) and the Liberal Party (PL), stood separately but failed to attract significant support.
The Democratic and Social Centre (CDS), a party founded by former Prime MinisterAdolfo Suárez, entered the Courts for its first and only time, setting a record result for third parties in future regional elections with 4 seats and over 10% of the share. United Left (IU), an electoral coalition between the Communist Party of Spain and other left-wing parties formed in 1986, failed to gain any seats and dropped from the 6.9% it had in 1983 to 5.4%.
The 47 members of the Cortes of Castilla–La Mancha were elected using the D'Hondt method and a closed listproportional representation, with a threshold of 3 percent of valid votes[b]—which included blank ballots—being applied in each constituency. Parties not reaching the threshold were not taken into consideration for seat distribution. Additionally, the use of the D'Hondt method might result in an effective threshold over three percent, depending on the district magnitude.[2] Seats were allocated to constituencies, corresponding to the provinces of Albacete, Ciudad Real, Cuenca, Guadalajara and Toledo. Each constituency was entitled to an initial minimum of five seats, with the remaining 22 allocated among the constituencies in proportion to their populations.[1][3]
The electoral law provided that parties, federations, coalitions and groupings of electors were allowed to present lists of candidates. However, groupings of electors were required to secure the signature of at least 1 percent of the electors registered in the constituency for which they sought election. Electors were barred from signing for more than one list of candidates. Concurrently, parties and federations intending to enter in coalition to take part jointly at an election were required to inform the relevant Electoral Commission within ten days of the election being called.[3][4][5]
Election date
The term of the Cortes of Castilla–La Mancha expired four years after the date of their previous election. Election day was to take place between the thirtieth and the sixtieth day from the date of expiry of parliament and set so as to make it coincide with elections to the regional assemblies of other autonomous communities. The previous election was held on 8 May 1983, which meant that the legislature's term would have expired on 8 May 1987. The election was required to take place no later than the sixtieth day from the date of expiry of parliament, setting the latest possible election date for the Cortes on Tuesday, 7 July 1987.[1][3][4][5]
The Cortes of Castilla–La Mancha could not be dissolved before the date of expiry of parliament. In the event of an investiture process failing to elect a regional President within a two-month period from the first ballot, the candidate from the party with the highest number of seats was to be deemed automatically elected.[1]
Opinion polls
The table below lists voting intention estimates in reverse chronological order, showing the most recent first and using the dates when the survey fieldwork was done, as opposed to the date of publication. Where the fieldwork dates are unknown, the date of publication is given instead. The highest percentage figure in each polling survey is displayed with its background shaded in the leading party's colour. If a tie ensues, this is applied to the figures with the highest percentages. The "Lead" column on the right shows the percentage-point difference between the parties with the highest percentages in a poll. When available, seat projections determined by the polling organisations are displayed below (or in place of) the percentages in a smaller font; 24 seats were required for an absolute majority in the Cortes of Castilla–La Mancha (23 until 23 December 1986).
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