The 1986 Basque regional election was held on Sunday, 30 November 1986, to elect the 3rd Parliament of the Basque Autonomous Community. All 75 seats in the Parliament were up for election.
The 75 members of the Basque Parliament were elected using the D'Hondt method and a closed listproportional representation, with an electoral threshold of five percent of valid votes[b] being applied in each constituency. Seats were allocated to constituencies, corresponding to the provinces of Álava, Biscay and Guipúzcoa, with each being allocated a fixed number of 25 seats in order to provide for an equal parliamentary representation of the three provinces, as required under the regional statute of autonomy.[1][2]
The electoral law allowed for parties and federations registered in the interior ministry, coalitions and groupings of electors to present lists of candidates. Parties and federations intending to form a coalition ahead of an election were required to inform the relevant Electoral Commission within ten days of the election call, whereas groupings of electors needed to secure the signature of at least 500 electors in the constituencies for which they sought election, disallowing electors from signing for more than one list of candidates.[2][3]
Election date
The term of the Basque Parliament expired four years after the date of its previous election, unless it was dissolved earlier. An election was required to take place within from thirty-six and forty-five days from the date of expiry of parliament. The previous election was held on 26 February 1984, which meant that the legislature's term would have expired on 26 February 1988. The election was required to be held no later than the forty-fifth day from dissolution, setting the latest possible election date for the Parliament on Monday, 11 April 1988.[1][2]
The lehendakari had the prerogative to dissolve the Basque Parliament at any given time and call a snap election, provided that no motion of no confidence was in process. In the event of an investiture process failing to elect a lehendakari within a sixty-day period from the Parliament re-assembly, the Parliament was to be dissolved and a fresh election called.[4]
Opinion polls
The tables below lists opinion polling results 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.
Voting intention estimates
The table below lists weighted voting intention estimates. Refusals are generally excluded from the party vote percentages, while question wording and the treatment of "don't know" responses and those not intending to vote may vary between polling organisations. When available, seat projections determined by the polling organisations are displayed below (or in place of) the percentages in a smaller font; 38 seats were required for an absolute majority in the Basque Parliament.
^The 1983 electoral law provided that blank ballots would not count as valid votes for the application of the 5 percent threshold in each district. However, this rule was not determinant in excluding any party from seat distribution during its time of application (the 1984 and 1986 elections). As a result, and for comparison purposes, blank ballots are shown here included within valid votes.
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