Brazil's Lula holds lead over Flavio Bolsonaro ahead of election, Datafolha poll shows

Read the original at The Straits Times ↗
The Straits Times · collected 2026-09-17 · by The Straits Times

Quick Summary

A recent Datafolha poll conducted from September 15 to 17 shows that Brazilian President Luiz Inacio Lula da Silva leads Senator Flavio Bolsonaro in a potential October presidential runoff with 46% and 44% support, respectively. The margin of error is 2 percentage points, indicating a technical tie between the two candidates. In a first-round poll, Lula had 39%, followed by Flavio Bolsonaro at 36%.
Written locally by qwen2.5:14b on 2026-09-18, using this article's own text rather than the other coverage of the same event (that is the story summary below).

AI analysis runs on qwen2.5:14b, locally

Story summary

A recent Datafolha poll conducted from September 15-17 shows that Brazil's President Luiz Inacio Lula da Silva maintains a narrow lead over Senator Flavio Bolsonaro, son of former President Jair Bolsonaro, in the upcoming October presidential election. In a potential runoff scenario, Lula leads with 46% support compared to Flavio Bolsonaro's 44%, which is unchanged from an earlier poll on September 11. Given a margin of error of ±2 percentage points, this result indicates a technical tie. The first-round preference polls show Lula at 39% and Flavio Bolsonaro at 36%. Under Brazil’s electoral system, if no candidate secures more than 50% in the initial round, the top two proceed to a runoff.

Written for “Brazil Election Polls” on 2026-09-18, grounded in this article and the 0 other(s) covering the same event.
Why this leaning score
This article does not take a side on a contested political question, so it has no leaning score. That is an answer rather than a gap: a match report or a rescue can be warmly or critically written without being left or right, and scoring it anyway is how approval of a subject gets recorded as a political position.
No political leaning scored for article 17308 · logged 2026-09-18

Signals How these are calculated →

Claims extracted
8
claim-shaped sentences
Uncertain
12%
1 of 8 hedged
Leaning
not political
takes no side on a contested political question
Correction & hedging signals
58.9
corrections and hedging in what we collected; not a measure of accuracy
Outlets on this story
1
Politics
Narrative spread
1
articles carrying this framing
Analyzed 2026-09-18 · how these are computed

Story

📰 Brazil Election Polls
Politics · 1 article(s) covering the same event.

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Compared with similar articles

This article reads unscored and hedges 12% of its claims. Each row says how that neighbour differs.
The Straits Times · 0.95 cosine similarity
⚖️ leaning not scored 🔴 0% hedged 0 of 9 📰 publisher trust 59
“The articles describe different polls conducted by BTG Pactual/Nexus and Datafolha on separate dates.”
The Straits Times · 0.89 cosine similarity
⚖️ leaning not scored 🔴 38% hedged 3 of 8 📰 publisher trust 59
“The articles describe different polls conducted by distinct organizations on separate dates.”
The Guardian
⚖️ leaning not scored 🔴 5% hedged 3 of 60 📰 publisher trust 95
“Article A describes Flávio Bolsonaro's campaign events and rallies in Brazil, while Article B reports on a poll showing Lula leading over Flavio Bolsonaro for the presidential election. These are different specific happenings.”
Al Jazeera
⚖️ Leans left 🔴 5% hedged 1 of 20 📰 publisher trust 96
“The articles report different aspects related to the election but describe separate events: one announces welfare increases and the other reports on a poll showing electoral support.”
The Straits Times
⚖️ Leans left 🔴 0% hedged 0 of 6 📰 publisher trust 59
“The articles describe different events on the same day: one about an increase in welfare benefits and another about a poll showing election leads.”

Publisher

The Straits Times · 626 article(s) · 1 correction(s) detected
Running correction rate · 1 correction(s)
2026-09-13
Russia hits Ukrainian-Polish border area, Kyiv says

Who wrote this

The Straits Times
412 article(s) here · 0 carrying a prediction
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2026-09-17 · assertive framing · Ukraine plans record defence spending in 2027
🔮 "If this happens, the location will be announced very soon.
More on this subject from The Straits Times
Brazil's Lula regains narrow edge over Bolsonaro in BTG/Nexus poll
2026-09-14 · The Straits Times · 95% similar
Lula would beat Bolsonaro in a Brazilian runoff, CNT/MDA poll suggests
2026-09-15 · The Straits Times · 89% similar
All 412 articles by The Straits Times →

Topics

Brazil Datafolha REUTERS SAO PAULO

Subjects

Datafolha ORG · 4× Flavio Bolsonaro PERSON · 4× Lula PERSON · 4× Brazil GPE · 3× Augusto Cury PERSON · 1× Jair Bolsonaro PERSON · 1× Luiz Inacio Lula da Silva PERSON · 1× Renan Santos PERSON · 1× Ronaldo Caiado PERSON · 1× SAO PAULO GPE · 1×

Narrative

In the runoff scenario, Lula had 46% support and Flavio Bolsonaro, the son of former President Jair Bolsonaro, had 44%, unchanged from the previous Datafolha poll released on September 11.
framing: assertive · carried by 1 article(s) · first seen 2026-09-18

Claims (8 extracted, 1 hedged)

Brazil's Lula holds lead over Flavio Bolsonaro ahead of election, Datafolha poll shows SAO PAULO, Sept 17 - Brazil President Luiz Inacio Lula da Silva held a narrow numerical lead over Senator Flavio Bolsonaro in a potential runoff in the October presidential election, according to a Datafolha poll published on Thursday. uncertain
Silva → hold → Thursday
In the runoff scenario, Lula had 46% support and Flavio Bolsonaro, the son of former President Jair Bolsonaro, had 44%, unchanged from the previous Datafolha poll released on September 11. asserted
Bolsonaro → have → September
• With a margin of error of 2 percentage points, the result indicates a technical tie. asserted
result → indicate → tie
• In a first-round scenario, Lula had 39%, compared with 36% for Flavio Bolsonaro. asserted
Lula → have → Bolsonaro
Augusto Cury had 6%, Ronaldo Caiado 4%, Renan Santos 3% and Romeu Zema 2%. asserted
Santos → have → %
• In the previous poll, Lula had 39% and Bolsonaro 35% in the first round. asserted
Bolsonaro → have → round
• Under Brazil's electoral system, if no candidate wins more than 50% of valid votes in the first round, the top two advance to a runoff. asserted
two → win → runoff
• Datafolha surveyed 2,002 people between September 15-17. asserted
Datafolha → survey → September
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