Spain's CIS poll gives Socialists 31%, PP 25% amid methodology doubts

CIS puts Socialists at 31% and PP at 25%: the doubt lies in the base

31% versus 25%. The CIS poll by Tezanos once again gives victory to the PSOE and reopens the same old storm. The figure is stark; the fine print, much less so.

Who is that percentage calculated on?

The focus of suspicion is not the headline, but the universe it is measured against. One of the most repeated theories holds that the CIS presents percentages based on those who say they voted in the last general election, while real results are calculated on valid votes, for candidates or blank. Changing the denominator moves several points without touching a single respondent. It is not fraud in itself. Nor is it an innocent decision.

That technical detail fuels the rest of the noise. Without delving into the sampling process, the comparison between what the body publishes and what the ballot boxes later spit out leaves room for more or less founded skepticism.

Why talk of rigging when a poll comes out?

When such a figure appears, the accusation of rigging slips into the conversation on its own. Some argue that these polls prepare the ground to legitimize in advance a disputed result, so that the anomalous seems already announced. Against that weighs an uncomfortable argument: the CIS has been right and wrong for years without anyone proving any manipulation.

The suspicion is also based, for some, on Indra's role in electoral infrastructure, a name that reappears every cycle. And on a colder calculation: slightly doctoring a defeat does not change who governs, but it changes the narrative with which people take to the streets.

The precedent no one forgets

The memory of last time remains. Memes circulated weeks before and the mockery was unanimous; the final result did not match the ridicule. That precedent forces anyone betting against Tezanos today to keep a card up their sleeve.

The poll says 31-25. The ballot boxes, for now, say nothing.