A quarter of the electorate hasn't committed yet
In the final weeks of Peru's presidential runoff, a Datum International poll places Keiko Fujimori ahead of Roberto Sánchez by a margin narrow enough to remind us that elections are not decided by polls but by the moments that move the undecided. With nearly a quarter of the electorate still unmoored and a majority of voters declaring the upcoming debate consequential, Peru finds itself in that familiar democratic threshold — where the outcome belongs not yet to either candidate, but to the unresolved conscience of the nation.
- Fujimori holds a 5.8-point lead in valid votes, but her advantage is geographically uneven — dominant in Lima and the north, while Sánchez commands the south, center, and east by wide margins.
- Nearly 25% of voters plan to cast blank or spoiled ballots, a silent protest that keeps the final outcome genuinely uncertain despite the headline numbers.
- Fifty-seven percent of Peruvians say the presidential debate will shape their vote, making it the single most consequential remaining event in the campaign.
- Both candidates face a fractured electorate: Fujimori cannot claim a national mandate, and Sánchez must overcome a structural deficit in the country's most populous region.
- The race is entering its final stretch with enough volatility that one strong or weak debate performance could realistically determine who governs Peru next.
Peru's presidential runoff is entering its decisive final phase. A Datum International poll conducted for El Comercio between May 26 and 30 shows Keiko Fujimori of Fuerza Popular leading Roberto Sánchez of Juntos por el Perú by 52.9% to 47.1% in valid votes — a 5.8-point margin that feels significant until the geography beneath it comes into view.
Fujimori's strength is concentrated in Lima, where she commands 62.9% of valid votes, and in the north, where she reaches 61%. But the country's interior tells a different story. Sánchez captures 65.9% in the south, 56.5% in the central region, and 56.6% in the east — a pattern that maps onto Peru's enduring divide between its coastal and highland identities.
What may matter most is the portion of the electorate that has rejected both candidates outright. Some 14.4% plan to cast blank ballots and another 10.5% intend to spoil theirs — nearly a quarter of all voters surveyed. Datum CEO Urpi Torrado flagged this as a critical variable in a race this close, noting that while blank and spoiled votes cannot directly shift the result, the people behind them have not yet fully committed.
Into this uncertainty steps the presidential debate, which 57% of voters say will influence their decision. For Fujimori, it is a chance to consolidate a lead that remains fragile outside her strongholds. For Sánchez, it may be the last realistic opportunity to close the gap in Lima and the north. In a race this geographically fractured and this close, a single evening of argument could yet determine Peru's next president.
Peru's presidential runoff is entering its final stretch, and a new poll from Datum International suggests the race remains fluid enough that a single event could reshape the outcome. The survey, conducted for El Comercio between May 26 and 30, shows Keiko Fujimori of Fuerza Popular leading Roberto Sánchez of Juntos por el Perú by a margin of 5.8 percentage points—52.9% to 47.1% in valid votes. But the more telling number may be what comes next: 57% of Peruvian voters say the upcoming presidential debate will influence how they cast their ballots, a signal that the electorate views this final campaign event as genuinely consequential.
The Datum simulation used an actual ballot design to approximate real voting conditions, attempting to capture how people actually behave when faced with the formal machinery of an election. Fujimori's lead is clearest in her strongholds. In Lima, she commands 62.9% of valid votes. The northern region gives her 61%. These are commanding margins in the country's most populous urban center and a traditionally conservative region. Yet the geography of Peruvian politics tells a different story elsewhere. Sánchez runs strongest in the country's interior and southern reaches. He captures 56.5% in the central region, 65.9% in the south, and 56.6% in the east. The pattern reflects a persistent divide: coastal and northern Peru tilts toward Fujimori; the highlands and southern departments lean toward Sánchez.
What may matter most, however, is the substantial portion of the electorate that remains genuinely undecided or actively rejecting both candidates. The poll found that 14.4% of voters plan to cast blank ballots, while another 10.5% intend to spoil their votes. Together, these represent nearly a quarter of the electorate—24.9% of those surveyed. Urpi Torrado, CEO of Datum Internacional, flagged this as a significant finding given how close the election has drawn. With the vote just weeks away, a quarter of the electorate still unmoored from either candidate creates genuine uncertainty about the final tally. Blank and spoiled votes cannot shift the outcome directly, but they represent real people who have not yet committed to either choice, and some portion of them may yet decide to vote for one of the two finalists.
The debate looms as the last major moment for either candidate to move these undecided voters or to reinforce support among their base. Fujimori enters it with a lead but without the commanding position her Lima numbers might suggest nationally. Sánchez has consolidated support in large swaths of the country but faces an uphill climb in the capital and the north. The 57% of voters who say the debate will matter to them are not being hyperbolic—in a race this close, with this much geographic fragmentation, a strong or weak performance in that single event could genuinely determine who becomes Peru's next president.
Notable Quotes
The elevated percentage of voters opting for blank or spoiled ballots represents a significant proportion given the proximity of election day, which could influence the final outcome— Urpi Torrado, CEO of Datum Internacional
The Hearth Conversation Another angle on the story
Why does a 5.8-point lead feel precarious in a race this close to the finish?
Because a quarter of the electorate hasn't committed yet. That's not a rounding error—that's real people who could move the needle in either direction, or stay home entirely.
The regional split is striking. How does a candidate win the capital by 13 points but lose the south by 10?
Peru's geography has always been its politics. Lima is urban, coastal, relatively wealthy. The south and center are poorer, more indigenous, more skeptical of the establishment. Fujimori represents continuity with the old order. Sánchez represents something different.
So the debate could actually matter?
It's the last chance for either of them to reach those undecided voters. If Sánchez performs well, he could consolidate some of that blank-vote bloc. If Fujimori stumbles, she loses her cushion.
What does 57% saying the debate will influence them actually mean?
It means people are still thinking, still open. They haven't made up their minds. In a normal election, that number would be lower—people would already know who they're voting for. Here, the race is genuinely unsettled.
Is blank voting a protest or genuine indecision?
Probably both. Some voters are disgusted with both options. Others are still deciding. Either way, they're not locked in, and that matters when margins are this thin.