Fujimori leads Datum poll by 3.9 points, but nearly 25% undecided as debate looms

Nearly a quarter of the electorate is refusing to choose
Blank and spoiled votes reach 24.9%, making undecided voters the true battleground of Peru's runoff.

En el umbral del debate presidencial del 31 de mayo, Perú se encuentra ante una elección que aún no ha terminado de decidirse. Keiko Fujimori encabeza las encuestas con una ventaja estrecha sobre Roberto Sánchez, pero casi una cuarta parte del electorado rechaza ambas opciones con votos en blanco o nulos, revelando una democracia que busca, más que un ganador, una razón para creer. En un país dividido por regiones, generaciones y desconfianzas acumuladas, el debate de esta noche no es un trámite sino el último espacio donde la política puede todavía convertirse en convicción.

  • Fujimori lidera con 39.7% frente al 35.4% de Sánchez, pero casi el 25% del electorado vota en blanco o nulo, convirtiendo ese margen en terreno inestable.
  • El mapa electoral está fracturado: Fujimori domina Lima y el norte, mientras Sánchez arrasa en el sur con 52.7%, y ninguno puede darse el lujo de ignorar ninguna región.
  • El 57% de los votantes afirma que el debate presidencial será decisivo para su voto, transformando el encuentro de esta noche en el evento más importante que resta en la campaña.
  • El voto anti-candidato impulsa a ambos lados casi por igual: el 12% vota contra Sánchez y el 20% vota contra Fujimori, revelando una elección donde el miedo pesa tanto como la esperanza.
  • Fujimori aventaja a Sánchez en percepción de propuestas sobre economía, seguridad, educación e infraestructura, pero esas percepciones aún no se han traducido en una ventaja consolidada entre indecisos y jóvenes.

Keiko Fujimori llega al debate presidencial del 31 de mayo con una ventaja real pero frágil. La última encuesta de Datum para El Comercio la sitúa en 39.7% frente al 35.4% de Roberto Sánchez, una diferencia de 3.9 puntos que parece sólida hasta que se observa lo que la rodea: el 14.4% vota en blanco y el 10.5% anula su voto. Ese casi 25% del electorado que se niega a elegir es el verdadero campo de batalla de esta segunda vuelta.

Cuando se excluyen los votos inválidos y se mide solo entre sufragios válidos, Fujimori sube a 52.9% y Sánchez a 47.1%. La distancia entre estas dos lecturas cuenta la historia real: la carrera es más cerrada de lo que los titulares sugieren, y el debate —que el 57% de los votantes considera decisivo— podría reconfigurar todo en los días que restan.

El mapa electoral está profundamente dividido. Fujimori domina Lima con 44.3% y el norte con 47.7%, pero Sánchez le da vuelta en el centro con 44.6% y en el sur con 52.7%. Esta fragmentación territorial significa que el debate cumple funciones distintas según la región: consolida donde ya hay apoyo y puede mover indecisos donde la disputa sigue abierta.

Las divisiones también son generacionales y de género. Fujimori lidera entre los más jóvenes de 18 a 24 años y entre las mujeres, mientras Sánchez se impone en la franja de 35 a 44 años y entre los hombres. En ambos grupos hay un volumen significativo de indecisos y votantes en blanco que podrían moverse con una actuación convincente esta noche.

Las razones del voto revelan la textura emocional de esta elección. El 12% de los votantes de Fujimori admite que vota contra Sánchez; el 20% de los votantes de Sánchez dice que vota contra Fujimori. El miedo al adversario pesa tanto como la fe en el propio candidato. En propuestas concretas, Fujimori aventaja a Sánchez en economía, infraestructura, educación y seguridad, y su equipo técnico ganó el debate de expertos. Pero esas percepciones no son inamovibles.

El debate de esta noche no es un acto protocolar: es el momento en que más de la mitad del electorado dice estar dispuesto a cambiar de opinión. Quien logre hablar de gobernar —y no solo de oponerse— podría ser quien entre a la última semana con el viento a favor.

Keiko Fujimori enters Peru's presidential debate on the evening of May 31st with a narrow lead, according to the latest Datum poll for El Comercio. Among votes actually cast, she holds 39.7% to Roberto Sánchez's 35.4%—a margin of 3.9 points that feels substantial until you account for the rest of the ballot. Blank votes reached 14.4%, spoiled ballots 10.5%. That nearly 25% of the electorate either refusing to choose or choosing not to participate represents the true battleground of this runoff.

The numbers shift dramatically when you exclude blank and spoiled votes and measure only valid ballots. Fujimori climbs to 52.9%, Sánchez to 47.1%. This inversion matters because it reveals two different electoral realities: one where voters have multiple options including rejection, and another where they must ultimately pick a candidate. The gap between these two readings is the story. It means the race is tighter than the headline suggests, and it means that Sunday's debate—which 57% of voters say will be "very" or "quite" decisive—could reshape everything.

Peru's electoral map is split into distinct regions, each telling a different story. Fujimori dominates Lima with 44.3% to Sánchez's 26.2%, and leads the north 47.7% to 30.6%. But Sánchez reverses the script in the center, where he takes 44.6% to her 34.2%, and in the south, where he pulls ahead decisively at 52.7% to her 27.3%. The east remains competitive, with Sánchez slightly ahead at 39.5% to 30.3%. This territorial fragmentation means neither candidate can afford complacency in any region, and it means the debate plays a different role in different parts of the country—consolidating support where it already exists, potentially shifting undecideds where the race remains fluid.

When Datum asked voters directly about the debate's importance, the response was clear: 35% said it would be "very decisive," another 22% "quite decisive." Only 36% combined said it would be "little" or "not at all" decisive. The remaining 7% were unsure. This concentration of opinion around the debate's potential impact reflects genuine uncertainty in the electorate. The race is not settled. The candidates are known—94% recognize Fujimori, 76% recognize Sánchez—but their plans and their ability to govern remain contested terrain.

Breaking down support by age reveals generational dynamics that suggest both campaigns have work to do. Among 18- to 24-year-olds, Fujimori leads 43.6% to 31.4%. But in the 35-to-44 bracket, Sánchez pulls ahead 45.8% to 30.1%. Fujimori recovers in the 45-to-54 group at 44.2% to 33.7%. Gender also divides the electorate: among men, Sánchez edges ahead 39.8% to 37.8%, while among women Fujimori leads 41.9% to 32.1%. These segments matter because they contain substantial numbers of undecideds and blank-vote sympathizers—voters who could move on the strength of a debate performance.

Why people say they will vote for each candidate reveals the emotional texture of this race. Fujimori voters cite her government plan (20%) and her ability to improve the economy (14%), but 12% explicitly say they are voting against Sánchez. For Sánchez supporters, the math is inverted: 20% say they are voting against Fujimori, while 18% cite his government plan and 11% point to economic improvement. Anti-vote sentiment fuels both campaigns nearly equally. This is a race where fear of the other candidate matters as much as faith in your own.

On specific policy areas, Fujimori's perceived advantage is consistent. Voters believe she has better proposals on the economy (53% to 23%), infrastructure (47% to 24%), education (46% to 27%), security (46% to 27%), and health (45% to 25%). Her campaign's technical team also won the recent debate among experts, with 50% saying Fuerza Popular prevailed. These perceptions give her momentum heading into Sunday, but they are not immovable. The Ipsos poll released the same day shows a similar picture—Fujimori at 39%, Sánchez at 35%—and similar regional splits, suggesting these findings are not outliers but reflections of genuine voter sentiment.

What happens in the next few hours will matter. The debate is not a sideshow; it is the event that more than half the electorate believes could change their minds. Fujimori has a lead, but it rests on a foundation of undecideds, blank votes, and regional divisions that remain genuinely contested. The candidate who can speak most convincingly about governing—not just about opposing the other side—may be the one who walks away with momentum into the final week.

The race is not settled. The candidates are known, but their plans and their ability to govern remain contested terrain.
— Datum poll analysis
Anti-vote sentiment fuels both campaigns nearly equally—20% of Sánchez voters cite voting against Fujimori; 12% of Fujimori voters cite voting against Sánchez.
— Datum poll on voter motivations
La Conversación del Hearth Otra perspectiva de la historia
Inventor

Why does the gap between raw votes and valid votes matter so much here?

Model

Because it tells you where the real uncertainty lives. When you count blank and spoiled ballots, nearly a quarter of the electorate is either refusing to participate or actively rejecting both options. That's not noise—that's a signal that something about this choice feels wrong to a lot of people.

Inventor

But Fujimori still leads in both measures, right?

Model

She does, but the lead shrinks when you only count valid ballots. More importantly, the size of that undecided bloc means the debate isn't just about persuading people to switch sides. It's about whether either candidate can convince people that voting for them is worth doing at all.

Inventor

The regional splits seem really stark. Does that mean the candidates are essentially fighting two different elections?

Model

Essentially, yes. Fujimori owns Lima and the north. Sánchez dominates the south. The center is contested. So when they debate, they're not really speaking to the same audience. A strong performance in one region might not move votes in another.

Inventor

What about the anti-vote thing—people saying they're voting against the other candidate rather than for their own?

Model

That's the fragility. Both campaigns are running partly on fear of the alternative. That's not a stable foundation. If the debate shifts perceptions about either candidate's competence or trustworthiness, you could see real movement.

Inventor

So the debate is genuinely decisive?

Model

For 57% of voters, yes. That's not hyperbole. These people say the debate will change how they vote. In a race this tight, with this much regional fragmentation and this much undecision, a strong debate performance could genuinely reshape the final week.

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