# Brazil Presidential Election First Round: 3rd Place

Updated: August 18, 2026

Category: Politics

Tags: Brazil, World, Global Elections, International Election Props

HTML: /markets/politics/brazil/brazil-presidential-election-first-round-3rd-place/

## Short Answer

**Key takeaway.** Both the **model** and the **market** expect Renan Santos to secure third place in the Brazil Presidential Election's first round, with no compelling evidence of mispricing.

## Key Claims (January 2026)

**- - Renan Santos and Ronaldo Caiado frequently poll in a technical tie at 4-5%.** - Renan Santos's campaign characteristics appear to support his current polling strength.
- Right-wing political fragmentation limits **market** share for non-incumbent candidates.

### Why This Matters (GEO)

- AI agents extract claims, not arguments.
- Improves citation probability in summaries and answer cards.
- Enables fact stitching across multiple sources.

## Executive Verdict

**Key takeaway.** **Market** at 52c implies **52%**, 1.6 points above **model**'s **50.4%**, despite no 2026 election scheduled.

### Who Wins and Why

| Outcome | Market | Model | Why |
| --- | --- | --- | --- |
| Renan Santos | 52.0% | 50.4% | Renan Santos is frequently polling in a technical tie for third place with Ronaldo Caiado. |
| Ratinho Júnior | 0.1% | 0.1% | Ratinho Júnior is not highlighted in polling data as a top contender for third place. |
| Ronaldo Caiado | 38.0% | 41.3% | Ronaldo Caiado frequently polls in a technical tie for third place with Renan Santos. |

## Model vs Market

| Outcome | Market Probability | Octagon Model Probability |
| --- | --- | --- |
| Renan Santos | 52.0% | 50.4% |
| Ratinho Júnior | 0.1% | 0.1% |
| Ronaldo Caiado | 38.0% | 41.3% |
| Eduardo Bolsonaro | 0.1% | 0.1% |
| Flávio Bolsonaro | 3.9% | 2.8% |
| Romeu Zema | 3.1% | 3.3% |
| Fernando Haddad | 0.1% | 0.1% |
| Luiz Inácio Lula da Silva | 0.9% | 0.7% |
| Camilo Santana | 0.1% | 0.1% |
| Michelle Bolsonaro | 0.1% | 0.1% |
| Geraldo Alckmin | 0.1% | 0.1% |
| Aldo Rebelo | 0.1% | 0.1% |
| Eduardo Leite | 0.1% | 0.1% |
| Tarcisio de Freitas | 0.1% | 0.1% |
| Jair Bolsonaro | 0.1% | 0.1% |
| Tereza Cristina | 0.2% | 0.2% |
| Helder Barbalho | 0.2% | 0.2% |
| Person M | 0.0% | — |
| Person N | 0.0% | — |
| Person O | 0.0% | — |
| Person P | 0.0% | — |
| Person Q | 0.0% | — |
| Person R | 0.0% | — |
| Person S | 0.0% | — |
| Person T | 0.0% | — |
| Person U | 0.0% | — |
| Person V | 0.0% | — |
| Person W | 0.0% | — |
| Person X | 0.0% | — |
| Person Y | 0.0% | — |
| Person Z | 0.0% | — |
| Other | 0.0% | — |

- Expiration: October 4, 2026

## Market Behavior & Price Dynamics

The implied probability of Tarcísio de Freitas securing third place in the first round of the 2026 Brazilian presidential election has shown a distinct downward trend. The contract opened at 60.5% in early August, rose to a peak of 65.0% around August 11, and then experienced a sharp decline to its current price of 52.5% by August 18. This recent 11-point drop is the most significant movement in the contract's history.

The repricing appears directly linked to recent polling data published mid-August. These polls consolidate the race around two main contenders, incumbent Luiz Inácio Lula da Silva (polling at 38-41%) and Flávio Bolsonaro (31-36%). This development suggests a more polarized two-way contest, reducing the perceived probability of any other candidate capturing a top-three position. The price drop from the mid-60s to the low-50s reflects this updated information.

It is essential to note that the total volume traded in this market is zero. Price movements are not the result of participant trading but rather of automated market maker adjustments to external data. Consequently, traditional technical indicators like support and resistance levels are not meaningful. The price action reflects a model's reaction to news flow, not active market conviction or sentiment established through trading activity.

## Contract Snapshot

A 'Yes' resolution for a candidate triggers if they receive the third-most valid votes in the first round of the Brazilian Presidential Election on October 4, 2026; otherwise, it triggers 'No'. Ties in valid votes will be broken alphabetically by the candidates' last names. The market will resolve based on official results from Brazil's Superior Electoral Court (TSE), and will resolve to "Other" if the outcome isn't definitively known by June 30, 2027, 11:59 PM ET.

## Market Discussion

Market participants generally anticipate Renan Santos to secure third place in Brazil's presidential election, citing recent polling, his social media outreach, and an anti-establishment platform appealing to younger right-wing voters. Ronaldo Caiado is considered the second most likely candidate for third, though recent surveys show him trailing Santos. Other candidates like Romeu Zema and Flávio Bolsonaro have minimal support for third place, as polls suggest they would finish either higher or significantly lower.

## Market Data

| Contract | Yes Bid | Yes Ask | Last Price | Volume | Open Interest |
| --- | --- | --- | --- | --- | --- |
| Aldo Rebelo | — | 0.1% | 0.1% | $9,865.09 | $0 |
| Other | 0% | 100% | 0% | $0 | $0 |
| Camilo Santana | — | 0.1% | 0.1% | $13,083.62 | $0 |
| Ratinho Júnior | — | 0.1% | 0.1% | $104,175.37 | $0 |
| Eduardo Bolsonaro | 0.1% | 0.2% | 0.1% | $45,571.5 | $0 |
| Eduardo Leite | — | 0.1% | 0.1% | $9,373.92 | $0 |
| Fernando Haddad | 0.1% | 0.2% | 0.1% | $21,712.98 | $0 |
| Flávio Bolsonaro | 3.1% | 4.7% | 3.9% | $25,103.35 | $0 |
| Geraldo Alckmin | — | 0.1% | 0.1% | $10,684.15 | $0 |
| Helder Barbalho | — | 0.1% | 0.2% | $3,481.15 | $0 |
| Jair Bolsonaro | — | 0.1% | 0.1% | $7,754.18 | $0 |
| Luiz Inácio Lula da Silva | 0.9% | 1% | 0.9% | $13,872.23 | $0 |
| Michelle Bolsonaro | — | 0.1% | 0.1% | $12,814.54 | $0 |
| Person M | 0% | 100% | 0% | $0 | $0 |
| Person N | 0% | 100% | 0% | $0 | $0 |
| Person O | 0% | 100% | 0% | $0 | $0 |
| Person P | 0% | 100% | 0% | $0 | $0 |
| Person Q | 0% | 100% | 0% | $0 | $0 |
| Person R | 0% | 100% | 0% | $0 | $0 |
| Person S | 0% | 100% | 0% | $0 | $0 |
| Person T | 0% | 100% | 0% | $0 | $0 |
| Person U | 0% | 100% | 0% | $0 | $0 |
| Person V | 0% | 100% | 0% | $0 | $0 |
| Person W | 0% | 100% | 0% | $0 | $0 |
| Person X | 0% | 100% | 0% | $0 | $0 |
| Person Y | 0% | 100% | 0% | $0 | $0 |
| Person Z | 0% | 100% | 0% | $0 | $0 |
| Renan Santos | 52% | 53% | 52% | $183,718.41 | $0 |
| Romeu Zema | 4.4% | 5.4% | 3.1% | $22,539.38 | $0 |
| Ronaldo Caiado | 37% | 40% | 38% | $52,692.55 | $0 |
| Tarcisio de Freitas | — | 0.1% | 0.1% | $8,746.5 | $0 |
| Tereza Cristina | — | 0.1% | 0.2% | $4,083.11 | $0 |

## How do Ronaldo Caiado, Renan Santos, and Romeu Zema compare in polling trends and regional support ahead of the October 2026 first round?

Brazil 2026 Presidential Election Status | Not scheduled [[^]](https://news.ballotpedia.org/2026/07/31/elections-ballotpedia-is-covering-in-august-2026/) |
Ronaldo Caiado Polling (Aug 2026) | 4-5% [[^]](https://g1.globo.com/politica/eleicoes/2026/pesquisa-eleitoral/noticia/2026/08/14/quaest-presidente-1o-turno-14-agosto.ghtml)[[^]](https://www.metropoles.com/brasil/a-53-dias-das-eleicoes-candidatos-da-3a-via-patinam-nas-pesquisas)[[^]](https://www.otempo.com.br/eleicoes/2026/pesquisas/2026/8/17/lula-e-flavio-bolsonaro-seguem-empatados-tecnicamente-em-eventual-2-turno-mostra-nova-pesquisa) |
Romeu Zema Polling (Aug 2026) | 2-3% [[^]](https://g1.globo.com/politica/eleicoes/2026/pesquisa-eleitoral/noticia/2026/08/14/quaest-presidente-1o-turno-14-agosto.ghtml)[[^]](https://www.metropoles.com/brasil/a-53-dias-das-eleicoes-candidatos-da-3a-via-patinam-nas-pesquisas)[[^]](https://www.otempo.com.br/eleicoes/2026/pesquisas/2026/8/17/lula-e-flavio-bolsonaro-seguem-empatados-tecnicamente-em-eventual-2-turno-mostra-nova-pesquisa) |

**No Brazilian presidential election is currently scheduled for October 2026**

No Brazilian presidential election is currently scheduled for October 2026. Research indicates that there is no evidence of Ronaldo Caiado, Renan Santos, or Romeu Zema running for president in such an election [[^]](https://news.ballotpedia.org/2026/07/31/elections-ballotpedia-is-covering-in-august-2026/)[[^]](https://ballotpedia.org/Executive_Order:_Safeguarding_Venezuelan_Oil_Revenue_for_the_Good_of_the_American_and_Venezuelan_People_(Donald_Trump,_2026)). Existing 2026 election coverage primarily focuses on U.S. state and local elections [[^]](https://news.ballotpedia.org/2026/07/31/elections-ballotpedia-is-covering-in-august-2026/)[[^]](https://ballotpedia.org/Clay_County,_Indiana,_elections,_2026)[[^]](https://ballotpedia.org/Executive_Order:_Safeguarding_Venezuelan_Oil_Revenue_for_the_Good_of_the_American_and_Venezuelan_People_(Donald_Trump,_2026))[[^]](https://ballotpedia.org/Fact_check/Would_it_be_almost_unprecedented_for_Donald_Trump_to_terminate_the_Iran_nuclear_deal).

Despite the absence of a confirmed election, retrieved information for August 2026 depicts Ronaldo Caiado (PSD), Renan Santos (Missão), and Romeu Zema (Novo) polling in the single digits, struggling to break the polarization between frontrunners Lula (PT) and Flávio Bolsonaro (PL) [[^]](https://g1.globo.com/politica/eleicoes/2026/pesquisa-eleitoral/noticia/2026/08/14/quaest-presidente-1o-turno-14-agosto.ghtml)[[^]](https://www.metropoles.com/brasil/a-53-dias-das-eleicoes-candidatos-da-3a-via-patinam-nas-pesquisas)[[^]](https://oglobo.globo.com/blogs/pulso/post/2026/08/quaest-presidencial-lula-tem-38percent-contra-31percent-de-flavio-no-1o-turno-caiado-renan-e-zema-seguem-em-3o.ghtml). Mid-August 2026 polling consistently places Ronaldo Caiado and Renan Santos at approximately 4-**5%**, while Romeu Zema typically polls between 2-**3%**, effectively putting them in a technical tie for 3rd place [[^]](https://g1.globo.com/politica/eleicoes/2026/pesquisa-eleitoral/noticia/2026/08/14/quaest-presidente-1o-turno-14-agosto.ghtml)[[^]](https://www.metropoles.com/brasil/a-53-dias-das-eleicoes-candidatos-da-3a-via-patinam-nas-pesquisas)[[^]](https://www.otempo.com.br/eleicoes/2026/pesquisas/2026/8/17/lula-e-flavio-bolsonaro-seguem-empatados-tecnicamente-em-eventual-2-turno-mostra-nova-pesquisa). Renan Santos, co-founder of MBL, has demonstrated relative strength among independent voters compared to Caiado and Zema, though this has not translated into a significant overall lead in national polls [[^]](https://g1.globo.com/politica/eleicoes/2026/pesquisa-eleitoral/noticia/2026/08/14/quaest-presidente-1o-turno-14-agosto.ghtml)[[^]](https://www.metropoles.com/brasil/a-53-dias-das-eleicoes-candidatos-da-3a-via-patinam-nas-pesquisas)[[^]](https://oglobo.globo.com/blogs/pulso/post/2026/08/quaest-presidencial-lula-tem-38percent-contra-31percent-de-flavio-no-1o-turno-caiado-renan-e-zema-seguem-em-3o.ghtml).

Candidates target specific regions and employ distinct strategies in their campaigns. Ronaldo Caiado concentrates his efforts on his base in Goiás, and Romeu Zema focuses on Minas Gerais [[^]](https://g1.globo.com/politica/eleicoes/2026/noticia/2026/08/16/renan-santos-inicia-campanha-a-presidencia-em-sao-paulo.ghtml). Renan Santos, who lacks significant party alliances or major television time, is heavily prioritizing digital engagement and direct mobilization, particularly within São Paulo [[^]](https://g1.globo.com/politica/eleicoes/2026/noticia/2026/08/16/renan-santos-inicia-campanha-a-presidencia-em-sao-paulo.ghtml).

## Which potential party endorsements or coalition shifts before October 2026 could most significantly impact the polling for Ronaldo Caiado and Romeu Zema?

2026 Election Coalition Status | Unprecedented lack of multiparty coalitions for non-incumbent candidates (2026 election [[^]](https://valorinternational.globo.com/politics/news/2026/08/11/congresss-growing-power-reshapes-brazils-presidential-alliances.ghtml)) |
Right-Wing Fragmentation | Persists among Ronaldo Caiado, Romeu Zema, Renan Santos, and Flávio Bolsonaro [[^]](https://valorinternational.globo.com/politics/news/2026/07/31/polls-cast-doubt-on-right-wing-support-for-flavio-bolsonaro-in-runoff.ghtml)[[^]](https://valorinternational.globo.com/politics/news/2026/08/11/congresss-growing-power-reshapes-brazils-presidential-alliances.ghtml) |
Runoff Voter Migration | Voters for Caiado, Zema, and Renan Santos expected to migrate to Flávio Bolsonaro in a second round [[^]](https://valorinternational.globo.com/politics/news/2026/07/31/polls-cast-doubt-on-right-wing-support-for-flavio-bolsonaro-in-runoff.ghtml)[[^]](https://br.headtopics.com/news/pesquisa-btg-nexus-eleitores-de-caiado-zema-e-renan-86476791) |

**The 2026 election is marked by significant right-wing political fragmentation**

The 2026 election is marked by significant right-wing political fragmentation. Non-incumbent candidates are experiencing an unprecedented lack of multiparty coalitions because parties are prioritizing the expansion of their congressional delegations to control budget allocations, rather than forming broad presidential alliances [[^]](https://valorinternational.globo.com/politics/news/2026/08/11/congresss-growing-power-reshapes-brazils-presidential-alliances.ghtml). This trend contributes to ongoing fragmentation among prominent right-wing figures such as Ronaldo Caiado, Romeu Zema, Renan Santos, and Flávio Bolsonaro [[^]](https://valorinternational.globo.com/politics/news/2026/07/31/polls-cast-doubt-on-right-wing-support-for-flavio-bolsonaro-in-runoff.ghtml)[[^]](https://valorinternational.globo.com/politics/news/2026/08/11/congresss-growing-power-reshapes-brazils-presidential-alliances.ghtml).

Runoff elections might see consolidation due to anti-Workers' Party sentiment. Despite the current fragmentation, political analysts anticipate a potential consolidation during a runoff election, primarily driven by strong anti-Workers' Party (PT) sentiment. In such a scenario, voters supporting Caiado, Zema, and Renan Santos are expected to migrate their support to Flávio Bolsonaro in a second round [[^]](https://valorinternational.globo.com/politics/news/2026/07/31/polls-cast-doubt-on-right-wing-support-for-flavio-bolsonaro-in-runoff.ghtml)[[^]](https://br.headtopics.com/news/pesquisa-btg-nexus-eleitores-de-caiado-zema-e-renan-86476791). However, the available research does not detail specific potential party endorsements or coalition shifts that could significantly impact Caiado's and Zema's polling before October 2026.

## What on-the-ground campaign metrics support the polling strength of Renan Santos's emerging candidacy versus Ronaldo Caiado's established party structure?

Renan Santos Polling | Approximately 4% of voting intentions (Quaest poll) [[^]](https://g1.globo.com/politica/eleicoes/2026/pesquisa-eleitoral/noticia/2026/08/14/quaest-presidente-1o-turno-14-agosto.ghtml) |
Ronaldo Caiado Polling | Approximately 4% of voting intentions (Quaest poll) [[^]](https://g1.globo.com/politica/eleicoes/2026/pesquisa-eleitoral/noticia/2026/08/14/quaest-presidente-1o-turno-14-agosto.ghtml) |
Renan Santos Campaign Start | August 16, 2026 (São Paulo) [[^]](https://g1.globo.com/politica/eleicoes/2026/noticia/2026/08/16/renan-santos-inicia-campanha-a-presidencia-em-sao-paulo.ghtml) |

**Renan Santos’s campaign characteristics support his current polling position, though specific quantifiable on-the-ground metrics directly bolstering his strength against Ronaldo Caiado's established party structure are not provided**

Renan Santos’s campaign characteristics support his current polling position, though specific quantifiable on-the-ground metrics directly bolstering his strength against Ronaldo Caiado's established party structure are not provided. As of mid-August 2026, Santos, representing the new party Missão, holds approximately **4%** of voting intentions in the latest Quaest poll, placing him in a technical tie for third place with Caiado [[^]](https://g1.globo.com/politica/eleicoes/2026/pesquisa-eleitoral/noticia/2026/08/14/quaest-presidente-1o-turno-14-agosto.ghtml). Santos launched his presidential campaign on August 16, 2026, in São Paulo, notably appearing in a bulletproof vest [[^]](https://g1.globo.com/politica/eleicoes/2026/noticia/2026/08/16/renan-santos-inicia-campanha-a-presidencia-em-sao-paulo.ghtml). His platform emphasizes populist security policies, including the "Right to the Enemy" penal theory and the militarization of vulnerable areas [[^]](https://g1.globo.com/politica/eleicoes/2026/noticia/2026/08/16/renan-santos-inicia-campanha-a-presidencia-em-sao-paulo.ghtml)[[^]](https://www.cnnbrasil.com.br/eleicoes/missao-oficializa-candidatura-de-renan-no-tse-e-apresenta-plano-de-governo/). His campaign style is characterized by an aggressive and highly visible personal approach [[^]](https://g1.globo.com/politica/eleicoes/2026/noticia/2026/08/16/renan-santos-inicia-campanha-a-presidencia-em-sao-paulo.ghtml).

Ronaldo Caiado leverages an established party machine and a strategic platform to maintain his polling. Caiado, also at approximately **4%** in the same Quaest poll [[^]](https://g1.globo.com/politica/eleicoes/2026/pesquisa-eleitoral/noticia/2026/08/14/quaest-presidente-1o-turno-14-agosto.ghtml), benefits from the support of the established PSD party, with its leader Gilberto Kassab serving as his vice-presidential candidate [[^]](https://valorinternational.globo.com/politics/news/2026/07/27/caiado-launches-presidential-bid-targeting-lula-flavio-bolsonaro.ghtml). His campaign relies significantly on his record as Governor of Goiás and appeals to the agribusiness and conservative sectors [[^]](https://valorinternational.globo.com/politics/news/2026/07/27/caiado-launches-presidential-bid-targeting-lula-flavio-bolsonaro.ghtml)[[^]](https://en.wikipedia.org/wiki/Ronaldo_Caiado_2026_presidential_campaign)[[^]](https://valorinternational.globo.com/politics/news/2026/08/17/caiado-campaigns-on-claim-only-he-can-beat-lula-as-vp-skips-opening-event.ghtml)[[^]](https://g1.globo.com/politica/eleicoes/2026/noticia/2026/07/26/ronaldo-caiado-perfil-2026.ghtml)[[^]](https://valorinternational.globo.com/politics/news/2026/03/31/center-right-bid-in-brazil-calls-for-amnesty-to-ease-polarization.ghtml). Caiado is strategically portraying himself as the sole "serious" opposition candidate capable of defeating Lula in a runoff election, distinguishing his extensive administrative experience from the ideological branding of other right-wing contenders [[^]](https://valorinternational.globo.com/politics/news/2026/08/17/caiado-campaigns-on-claim-only-he-can-beat-lula-as-vp-skips-opening-event.ghtml).

## What is the historical accuracy of pollsters like Quaest and BTG/Nexus in predicting support for third-place candidates in recent Brazilian presidential elections?

Quaest General Accuracy Ranking | Fifth among evaluated institutes since 2002 (2026 BTG Pactual report) [[^]](https://revistaforum.com.br/noticias/quais-pesquisas-mais-acertaram-eleicoes-presidenciais-segundo-btg/) |
2022 Election Pollster Performance | Underestimated Jair Bolsonaro's vote share [[^]](https://www.reuters.com/world/americas/brazil-polling-firms-among-big-losers-election-2022-10-03/)[[^]](https://www.bloomberglinea.com/2022/10/03/brazil-elections-opinion-polls-fall-short-in-predicting-depth-of-bolsonaros-support/)[[^]](https://www.bloomberglinea.com.br/2022/10/03/por-que-pesquisas-nao-captaram-forca-de-bolsonaro-veja-qual-chegou-mais-perto/)[[^]](https://www.theguardian.com/world/2022/oct/03/why-did-the-brazil-election-pollsters-get-bolsonaros-vote-so-wrong) |
Third-place Candidates 2026 Polling | Consistently polling in single digits [[^]](https://www.reuters.com/world/americas/flavio-bolsonaro-closes-lula-nexusbtg-poll-brazil-election-2026-08-03/)[[^]](https://www.nexus.fsb.com.br/estudos-divulgados/pesquisa-btg-nexus-de-intencao-de-votos-para-presidente-do-brasil-3-de-agosto-de-2026/)[[^]](https://www.sociedadmedia.com/brazil-election-polls-renan-santos-2026/) |

**Specific historical accuracy for third-place candidates from Quaest and BTG/Nexus is not readily available [[^]](https://newsroom.ap.org/editorial-photos-videos/detail?itemid=33928c1d8d40482a9d4834c17afd3205&mediatype=video)[[^]](https://www.ap.org/elections/)**

Specific historical accuracy for third-place candidates from Quaest and BTG/Nexus is not readily available [[^]](https://newsroom.ap.org/editorial-photos-videos/detail?itemid=33928c1d8d40482a9d4834c17afd3205&mediatype=video)[[^]](https://www.ap.org/elections/). While a 2026 BTG Pactual report ranked Quaest fifth overall in accuracy among institutes evaluated for Brazilian presidential elections since 2002, major pollsters, including Quaest and FSB/BTG Pactual, generally struggled in the 2022 Brazilian presidential election [[^]](https://revistaforum.com.br/noticias/quais-pesquisas-mais-acertaram-eleicoes-presidenciais-segundo-btg/)[[^]](https://www.reuters.com/world/americas/brazil-polling-firms-among-big-losers-election-2022-10-03/). They largely failed to accurately forecast first-round results, notably underestimating incumbent President Jair Bolsonaro's vote share and predicting wider margins between the top two candidates than materialized [[^]](https://www.reuters.com/world/americas/brazil-polling-firms-among-big-losers-election-2022-10-03/)[[^]](https://www.bloomberglinea.com/2022/10/03/brazil-elections-opinion-polls-fall-short-in-predicting-depth-of-bolsonaros-support/)[[^]](https://www.bloomberglinea.com.br/2022/10/03/por-que-pesquisas-nao-captaram-forca-de-bolsonaro-veja-qual-chegou-mais-perto/)[[^]](https://www.theguardian.com/world/2022/oct/03/why-did-the-brazil-election-pollsters-get-bolsonaros-vote-so-wrong).

Structural challenges have significantly hampered Brazilian pollsters in recent elections. A key factor has been the absence of an updated national census since 2010, which complicates the calibration of representative samples [[^]](https://www.reuters.com/world/americas/brazil-polling-firms-among-big-losers-election-2022-10-03/)[[^]](https://www.theguardian.com/world/2022/oct/03/why-did-the-brazil-election-pollsters-get-bolsonaros-vote-so-wrong). Additionally, last-minute voter shifts and potential biases in reaching certain segments of the electorate have contributed to inaccuracies [[^]](https://www.reuters.com/world/americas/brazil-polling-firms-among-big-losers-election-2022-10-03/)[[^]](https://www.theguardian.com/world/2022/oct/03/why-did-the-brazil-election-pollsters-get-bolsonaros-vote-so-wrong). For the upcoming 2026 presidential race, current polling from BTG/Nexus and Genial/Quaest indicates a primary focus on the tightening competition between Lula and Flávio Bolsonaro [[^]](https://www.reuters.com/world/americas/flavio-bolsonaro-closes-lula-nexusbtg-poll-brazil-election-2026-08-03/)[[^]](https://www.nexus.fsb.com.br/estudos-divulgados/pesquisa-btg-nexus-de-intencao-de-votos-para-presidente-do-brasil-3-de-agosto-de-2026/). Third-place candidates consistently poll in the single digits, reflecting a fragmented third-way lane [[^]](https://www.reuters.com/world/americas/flavio-bolsonaro-closes-lula-nexusbtg-poll-brazil-election-2026-08-03/)[[^]](https://www.nexus.fsb.com.br/estudos-divulgados/pesquisa-btg-nexus-de-intencao-de-votos-para-presidente-do-brasil-3-de-agosto-de-2026/)[[^]](https://www.sociedadmedia.com/brazil-election-polls-renan-santos-2026/).

## How do the polling numbers for the leading third-place candidates, Caiado and Santos, fluctuate in response to major campaign events involving Lula and Flávio Bolsonaro?

Ronaldo Caiado and Renan Santos Polling | 4% each (as of August 18, 2026) [[^]](https://www.aljazeera.com/news/2026/8/15/lula-holds-slim-lead-over-flavio-bolsonaro-ahead-of-brazil-election)[[^]](https://g1.globo.com/politica/eleicoes/2026/pesquisa-eleitoral/noticia/2026/08/14/quaest-presidente-1o-turno-14-agosto.ghtml)[[^]](https://www.americasquarterly.org/article/brazil-meet-the-candidates-2026/)[[^]](https://www.sociedadmedia.com/brazil-election-polls-renan-santos-2026/) |
Flávio Bolsonaro Candidacy Confirmation | July 25, 2026 [[^]](https://www.ap.org/news-highlights/en-foco/2026/nueva-presidenta-de-peru-asume-el-cargo-y-otras-fotos-de-la-semana-en-latinoamerica-y-el-caribe/) |
Lula Reelection Campaign Launch | By August 2, 2026 [[^]](https://newsroom.ap.org/detail/BrazilsLulalaunchesreelectionbidasconcernsriseoverforeigninterference/d6efdc6c54e0444383f418775e717227/video) |

**Leading third-place candidates Caiado and Santos currently poll at 4%**

Leading third-place candidates Caiado and Santos currently poll at **4%**. As of August 18, 2026, Ronaldo Caiado and Renan Santos each maintain **4%** support in recent surveys, positioning them in a fragmented third-way lane and struggling to achieve single-digit backing [[^]](https://www.aljazeera.com/news/2026/8/15/lula-holds-slim-lead-over-flavio-bolsonaro-ahead-of-brazil-election)[[^]](https://g1.globo.com/politica/eleicoes/2026/pesquisa-eleitoral/noticia/2026/08/14/quaest-presidente-1o-turno-14-agosto.ghtml)[[^]](https://www.americasquarterly.org/article/brazil-meet-the-candidates-2026/)[[^]](https://www.sociedadmedia.com/brazil-election-polls-renan-santos-2026/). Caiado garners support from a more traditional center-right base as a former governor, while Santos has cultivated an anti-establishment platform through social media, opposing both Lula and Bolsonaro [[^]](https://www.sociedadmedia.com/brazil-election-polls-renan-santos-2026/)[[^]](https://oglobo.globo.com/politica/eleicoes-2026/noticia/2026/08/16/retorno-as-origens-e-disputa-sobre-seguranca-e-soberania-marcam-inicio-da-corrida-presidencial.ghtml). These candidates appeal to voters disaffected with the dominant Lula-Bolsonaro duopoly in the 2026 Brazilian presidential race [[^]](https://www.aljazeera.com/news/2026/8/15/lula-holds-slim-lead-over-flavio-bolsonaro-ahead-of-brazil-election)[[^]](https://g1.globo.com/politica/eleicoes/2026/pesquisa-eleitoral/noticia/2026/08/14/quaest-presidente-1o-turno-14-agosto.ghtml)[[^]](https://www.americasquarterly.org/article/brazil-meet-the-candidates-2026/)[[^]](https://www.sociedadmedia.com/brazil-election-polls-renan-santos-2026/).

Specific data on third-party candidate fluctuations is currently unavailable. Despite significant campaign developments, detailed polling information showing how Caiado or Santos' numbers fluctuate specifically in response to events involving Luiz Inácio Lula da Silva or Flávio Bolsonaro has not been provided [[^]](https://www.ap.org/news-highlights/en-foco/2026/nueva-presidenta-de-peru-asume-el-cargo-y-otras-fotos-de-la-semana-en-latinoamerica-y-el-caribe/). Key campaign milestones include Flávio Bolsonaro's official confirmation as his father's party's presidential candidate on July 25, 2026 [[^]](https://www.ap.org/news-highlights/en-foco/2026/nueva-presidenta-de-peru-asume-el-cargo-y-otras-fotos-de-la-semana-en-latinoamerica-y-el-caribe/), and President Lula's formal launch of his reelection campaign by August 2, 2026 [[^]](https://newsroom.ap.org/detail/BrazilsLulalaunchesreelectionbidasconcernsriseoverforeigninterference/d6efdc6c54e0444383f418775e717227/video). The official campaign kick-off on August 16, 2026, further highlighted the election's polarized nature, with both Lula and Flávio Bolsonaro conducting major rallies in their respective political strongholds [[^]](https://oglobo.globo.com/politica/eleicoes-2026/noticia/2026/08/16/retorno-as-origens-e-disputa-sobre-seguranca-e-soberania-marcam-inicio-da-corrida-presidencial.ghtml)[[^]](https://www.bbc.com/portuguese/articles/clyjj0ykp55o)[[^]](https://apnews.com/article/brazil-lula-flavio-bolsonaro-campaign-opens-8f4ad67b107cb05736f450f67198b190).

## What Could Change the Odds

**Brazil's next general election is scheduled for October 2026 [[^]](https://newsroom.ap.org/detail/BrazilsLulalaunchesreelectionbidasconcernsriseoverforeigninterference/d6efdc6c54e0444383f418775e717227/video).** The first round of the 2026 Brazilian presidential election is set for October 4, 2026, with a potential runoff on October 25, 2026, if no candidate secures more than half of valid votes [[^]](https://en.wikipedia.org/wiki/2026_Brazilian_general_election)[[^]](https://www.tse.jus.br/eleicoes/arquivos/manual-do-eleitor-2026/@@display-file/file/MANUAL%2520DO%2520ELEITOR%25202026.pdf)[[^]](https://www.tse.jus.br/servicos-judiciais/audiencias-publicas/arquivos/minutas-das-resolucoes-2026/inteiro-teor/resolucao-e-voto-atos-gerais/@@display-file/file/resolucao-e-voto-atos-gerais.pdf). Official campaign activities began on August 16, 2026, and free electoral radio and television advertising is scheduled to commence on August 28, 2026 [[^]](https://www.tse.jus.br/eleicoes/eleicoes-2026)[[^]](https://apnews.com/article/brazil-lula-flavio-bolsonaro-campaign-opens-8f4ad67b107cb05736f450f67198b190).

**The presidential race is primarily polarized between President Luiz Inácio Lula da Silva (PT) and Senator Flávio Bolsonaro (PL), who consistently poll as the top two candidates [[^]](https://en.wikipedia.org/wiki/Opinion_polling_for_the_2026_Brazilian_presidential_election)[[^]](https://www.gazetadopovo.com.br/eleicoes/2026/pesquisa-eleitoral-2026/quaest-pesquisa-presidente-agosto-2026/)[[^]](https://g1.globo.com/politica/eleicoes/2026/pesquisa-eleitoral/noticia/2026/08/14/quaest-presidente-1o-turno-14-agosto.ghtml)[[^]](https://www.sociedadmedia.com/brazil-election-polls-renan-santos-2026/).** The third-place field remains highly fragmented; candidates including Renan Santos (Missão), Ronaldo Caiado (PSD), and Romeu Zema (Novo) all poll in the low single digits, typically **2%**–**5%**, and have not consolidated as a unified alternative [[^]](https://en.wikipedia.org/wiki/Opinion_polling_for_the_2026_Brazilian_presidential_election)[[^]](https://www.gazetadopovo.com.br/eleicoes/2026/pesquisa-eleitoral-2026/quaest-pesquisa-presidente-agosto-2026/)[[^]](https://g1.globo.com/politica/eleicoes/2026/pesquisa-eleitoral/noticia/2026/08/14/quaest-presidente-1o-turno-14-agosto.ghtml)[[^]](https://www.sociedadmedia.com/brazil-election-polls-renan-santos-2026/)[[^]](https://www.economist.com/interactive/2026-brazil-election-tracker).

## Key Dates & Catalysts

- **Closes:** October 04, 2026

## Decision-Flipping Events

- Brazil's next general election is scheduled for October 2026 [^] .
- The first round of the 2026 Brazilian presidential election is set for October 4, 2026, with a potential runoff on October 25, 2026, if no candidate secures more than half of valid votes [^] [^] [^] .
- Official campaign activities began on August 16, 2026, and free electoral radio and television advertising is scheduled to commence on August 28, 2026 [^] [^] .
- The presidential race is primarily polarized between President Luiz Inácio Lula da Silva (PT) and Senator Flávio Bolsonaro (PL), who consistently poll as the top two candidates [^] [^] [^] [^] .

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## Historical Resolutions

No historical resolution data available for this series.

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