Spain's Electoral Board finds CIS breached law by withholding poll methodology

In a decision issued by the Junta Electoral Central, the Centro de Investigaciones Sociológicas, under José Félix Tezanos, was found to have contravened article 69.8 of the LOREG by not delivering the Partido Popular the full methodological breakdown of its October 2026 pre-electoral barometer within the statutory timeframe. The board instructed the CIS president to avoid any repeat of such conduct during the rest of the campaign and to provide, as soon as feasible, all data related to the "Estudio 3584 Preelectoral elecciones generales 2026".

While the ruling accepts part of the PP's complaint, it rejects the opening of a sanctioning file against Tezanos and dismisses the remaining allegations. The contested poll showed a large lead for the PSOE, but the PP argues that the lack of methodological transparency hampers verification of the results. The board’s resolution emphasizes compliance with election-law deadlines and the need for full disclosure of poll data.