Why The 2026 Presidential Race is Shifting Right Now

What Happened

A fresh Quaest poll commissioned by Globo has revealed critical insights into the upcoming 2026 presidential race in São Paulo. Released on Wednesday, the survey captures the shifting dynamics among first-round voters in Brazil's most populous and economically influential state as the political landscape heats up.

The research highlights a wide and diverse field of potential contenders, reflecting a fragmented early race. Mentioned figures in the broader national discussion include incumbent-aligned and opposition hopefuls such as Lula, Flávio, Cury, Renan, Caiado, Zema, Clariana, Edmilson, Hertz, Rui, Samara, Wilson, and Avalanche.

Context and Background

São Paulo serves as the ultimate bellwether for Brazilian national elections due to its massive electorate. Campaigns traditionally invest heavily in the state to build momentum, counteract regional strongholds, and capture crucial media attention.

To map out these shifting sentiments, Quaest conducted rigorous fieldwork by interviewing 1,800 eligible voters aged 16 and older between September 19 and September 22. The survey operates with a margin of error of two percentage points, plus or minus, and maintains a 95% confidence level. For regulatory compliance and transparency, the poll is officially registered with the Superior Electoral Court (TSE) under the identifier BR-08886/2026.

Why It Matters

Beyond raw candidate positioning, the data points to a notable and rapid hardening of voter opinions across the state.

According to the findings, 80% of interviewed voters now state their choice of candidate is definitive. This represents a sharp and consequential increase from the 74% who reported firm commitments in a previous survey conducted just weeks prior on September 8.

Conversely, only 20% of respondents currently indicate they might still change their minds before election day on October 4, marking a drop from 26% in the previous round. This growing rigidity among the electorate alters the strategic calculus for all campaigns involved.

With fewer movable voters on the table, late-stage campaign strategies must pivot away from broad persuasion efforts. Instead, candidates will likely need to focus heavily on high-turnout mobilization of their existing bases and targeted messaging to secure their remaining margins.

Future Outlook

As the official October 4 election date draws closer, attention will turn to how candidates adjust their ground games in light of shrinking persuasion windows. Observers will closely monitor subsequent tracking polls to see if this hardening of voter preference holds steady or if final-stretch debates and media broadcasts can shake up the final tallies in São Paulo.