Fujimori leads Sánchez 39.8% to 35.9% in Datum poll, but nearly 25% remain undecided

Fear of the opponent is nearly as powerful as hope
Both candidates' supporters cite voting against their rival as a primary reason for their choice.

En un Perú fracturado por geografía, generación y desconfianza, la segunda vuelta presidencial entre Keiko Fujimori y Roberto Sánchez llega a su momento más incierto: una encuesta Datum muestra a Fujimori con una ventaja estrecha de 39.8% frente a 35.9%, pero casi una cuarta parte del electorado permanece sin definirse, convirtiendo el debate del domingo en algo más que un ritual democrático. La historia que se cuenta aquí no es solo la de dos candidatos compitiendo por el poder, sino la de un país que vota tanto por miedo como por esperanza, buscando en el escenario televisivo la claridad que las urnas aún no le han dado.

  • La ventaja de Fujimori se desvanece cuando se depuran los votos inválidos: 52.9% contra 47.1% revela una carrera que puede cambiar de manos en horas.
  • El país está partido en dos mapas superpuestos: Lima y el norte son territorio fujimorista, mientras el sur y el centro responden al nombre de Sánchez.
  • Casi uno de cada cuatro votantes aún no ha decidido, vota en blanco o anula su voto, una masa crítica que ningún candidato puede ignorar.
  • El miedo al adversario moviliza tanto como la convicción: el 20% de los votantes de Sánchez lo eligen para frenar a Fujimori, y el 12% de los fujimoristas hacen lo mismo a la inversa.
  • El 57% del electorado considera el debate del domingo decisivo, transformando una noche de televisión en el verdadero campo de batalla electoral.

La segunda vuelta presidencial peruana entra en su recta final con una encuesta Datum que muestra a Keiko Fujimori de Fuerza Popular con 39.8% frente al 35.9% de Roberto Sánchez, pero el dato más revelador no está en esa diferencia sino en el 25% de votantes que aún no se ha definido, vota en blanco o anula su sufragio. Cuando se cuentan únicamente los votos válidos, la ventaja de Fujimori se reduce a 52.9% contra 47.1%, una brecha que el debate del domingo podría cerrar por completo.

El territorio cuenta una historia de dos países dentro de uno. Fujimori domina Lima con 44.3% y el norte con 47.7%, mientras Sánchez arrasa en el sur con 52.7%, lidera el centro con 44.6% y se impone levemente en el oriente con 39.5%. Esta fragmentación geográfica obliga a ambos candidatos a hablarle simultáneamente a electorados con prioridades distintas, sin poder descuidar ningún frente.

Lo que hace del debate un evento genuinamente decisivo es la propia percepción del electorado: el 57% lo considera muy o bastante determinante para su voto final. A eso se suma una dinámica de voto negativo que recorre ambas bases de apoyo. Entre los seguidores de Sánchez, el 20% vota explícitamente para impedir que Fujimori gane; entre los de Fujimori, el 12% actúa por el mismo impulso inverso. El miedo al adversario rivaliza con la fe en el propio candidato.

Fujimori llega al debate con ventajas estructurales: la conocen el 94% de los votantes frente al 76% que reconoce a Sánchez, y lidera en percepción de propuestas en economía, seguridad, educación e infraestructura por márgenes de entre 20 y 30 puntos. Sin embargo, Sánchez supera a su rival entre los votantes de 35 a 44 años y entre los hombres, mientras Fujimori lidera entre las mujeres. Una encuesta paralela de Ipsos confirma cifras casi idénticas, lo que sugiere que estos números reflejan condiciones reales y no ruido estadístico. Peru, en suma, llega al debate dividido, persuadible y con el resultado todavía abierto.

Peru's presidential runoff is tightening as it heads into a Sunday night debate that pollsters believe could reshape the race entirely. A new Datum survey for El Comercio shows Keiko Fujimori of Fuerza Popular holding a narrow lead of 39.8% to Roberto Sánchez's 35.9%, but the real story lies in the nearly 25% of voters still undecided, casting blank ballots, or spoiling their votes. When those invalid votes are stripped away and only valid ballots are counted, Fujimori's cushion shrinks dramatically to 52.9% against Sánchez's 47.1%—a gap that could evaporate entirely depending on how the undecided break.

The poll reveals a country fractured along geographic lines. In Lima and the northern regions, Fujimori commands substantial leads, with 44.3% and 47.7% respectively compared to Sánchez's 26.2% and 30.6%. But the interior tells a different story. Sánchez dominates the south with 52.7% to Fujimori's 27.3%, leads the center 44.6% to 34.2%, and edges ahead in the eastern regions 39.5% to 30.3%. This territorial divide means neither candidate can afford a misstep in Sunday's debate; small movements in key regions could determine the outcome.

What makes the debate potentially decisive is not just the closeness of the race but the electorate's own assessment of its importance. Fifty-seven percent of voters say the debate will be "very" or "quite" decisive in their final choice. That concentration of persuadable voters—combined with the large bloc of blank, spoiled, and undecided ballots—creates a scenario where performance on stage could genuinely alter the trajectory. The remaining 36% view the debate as having little or no impact, but that still leaves a substantial pool of minds not yet made up.

The reasons voters give for their choices reveal something darker about the race: negative voting is a major engine for both sides. Among Fujimori supporters, 20% cite her government plan as the main reason, 14% say she'll improve the economy, but 12% are voting against Sánchez. For Sánchez voters, the pattern flips: 20% are voting explicitly to prevent Fujimori from winning, 18% cite his government plan, and 11% believe he'll improve the economy. In other words, fear of the opponent is nearly as powerful as hope for one's preferred candidate.

Fujimori enters the debate with a significant advantage in name recognition and policy perception. Ninety-four percent of voters know who she is, compared to 76% for Sánchez. On specific policy areas—economics, infrastructure, education, security, and health—Fujimori leads substantially, with voters crediting her with the better proposals by margins ranging from 20 to 30 percentage points. Yet these advantages are not insurmountable. The sheer volume of undecided voters, the regional fragmentation, and the acknowledged power of Sunday's debate to move opinion suggest the race remains genuinely open.

Age and gender breakdowns show the competition is being fought across different demographic terrain. Among voters aged 35 to 44, Sánchez actually leads 45.8% to Fujimori's 30.1%, suggesting he has particular appeal to middle-aged voters. Among men overall, Sánchez edges ahead 39.8% to 37.8%, while Fujimori leads among women 41.9% to 32.1%. These patterns mean both campaigns must calibrate their debate strategy to different audiences simultaneously.

A parallel Ipsos poll released the same day largely confirms Datum's findings, placing Fujimori at 39% and Sánchez at 35%, with similar regional patterns and comparable levels of undecided voters. The consistency between pollsters suggests these numbers reflect genuine underlying conditions rather than polling noise. What both surveys underscore is that Peru's electoral map is deeply divided, its voters remain substantially persuadable, and the debate scheduled for Sunday night genuinely could reshape not just the election outcome but the narrative of governance each candidate will carry into office.

Among Fujimori supporters, 20% cite her government plan, but 12% are voting explicitly to prevent Sánchez from winning
— Datum poll findings
For Sánchez voters, 20% are voting to prevent Fujimori from winning, 18% cite his government plan
— Datum poll findings
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 how many voters are still rejecting both options. When you count blank and spoiled ballots, Fujimori's lead looks comfortable at 52.9%. But in raw votes, it's only 3.9 points. That 25% of people not voting for either candidate—they're the real electorate. They could break either way.

Inventor

And the regional split—is that unusual for Peru?

Model

It's stark. You have Lima and the north as Fujimori territory, the south as Sánchez country, and the center and east genuinely contested. It's not just a city-versus-countryside thing. It's almost like two different elections happening in the same country.

Inventor

The debate being "decisive" for 57% of voters—does that actually happen, or is that what people say they want to believe?

Model

That's the honest question. People say debates matter, and sometimes they do move opinion. But here, with this many undecided voters and this much regional fragmentation, a strong performance could genuinely consolidate support or crack it. The debate isn't the whole story, but it's not nothing either.

Inventor

Why is anti-voting so strong for both candidates?

Model

Because neither one has built a positive coalition. Fujimori voters are partly voting for her plan, but a meaningful chunk is voting against Sánchez. Same thing reversed for Sánchez supporters. That's unstable. It means the debate could flip people if one candidate can make the other look worse or themselves look more trustworthy.

Inventor

What happens to those blank and spoiled votes?

Model

That's the mystery. Some are protest votes—people rejecting both options entirely. Some are accidental. Some are voters who show up but haven't decided. If they break toward Fujimori, she wins comfortably. If they break toward Sánchez or stay home, the race tightens further. The debate might convince some of them to actually vote for someone.

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