Brazil presidential election: first round

Romeu Zema shows varied national support and second-round competitiveness. Polling data from AtlasIntel and Datafolha indicate Zema is in a technical tie with Lula in national second-round scenarios ^[1]. His national first-round support fluctuates between 1.6% and 6.2% ^[2], and he is in a tie with Renan Santos and Caiado for president specifically in Minas Gerais ^[4]. The provided research, however, does not include any polling data for Tarcísio de Freitas.

Voter rejection rates for Lula and Flávio Bolsonaro are substantial. Rejection rates for Lula range from 48% to 52.5% ^[3], while for Flávio Bolsonaro, they are between 46% and 49.8% ^[3]. The available web research does not detail the specific voting preferences of voters in the Southeast region (Minas Gerais, São Paulo) who express disapproval of both Lula and Bolsonaro for Zema, meaning a distinct consolidation trend for Zema among this demographic is not illustrated by the current data.

No specific candidate has currently secured formal national endorsements from at least two of the three major 'Centrão' parties: União Brasil, MDB, and PSD. The President of the Workers' Party (PT) has confirmed that both MDB and PSD are not part of a national coalition with Luiz Inácio Lula da Silva ^[1]. Furthermore, the MDB is considering either fielding its own presidential candidate or allowing its state chapters to form alliances independently, rather than issuing a single national endorsement ^[3].

The PSD is also expected to present its own presidential candidate, with Ronaldo Caiado expressing "absolute certainty" regarding this plan ^[4]. The party aims to garner support from MDB and União Brasil for this endeavor ^[4]. Meanwhile, União Brasil has yet to define its presidential support, indicating that this crucial decision will be finalized by August ^[2]. Potential candidates, such as Rodrigo Pacheco, are awaiting agreements with União Brasil to determine their party affiliations ^[5].

Crucial pre-election economic trends cannot be determined from available data. The specific month-over-month trends for Brazil's official IPCA inflation rate and the IBGE national unemployment rate in July, August, and September 2026 cannot be established. This is because the necessary data for these particular months, which immediately precede Brazil's first-round presidential election scheduled for October 4, 2026, with a potential second round on October 25, 2026 ^[1], is not contained within the provided web research.

Current data is insufficient for a comprehensive pre-election economic analysis. To accurately assess the requested trends, data for July, August, and September 2026 would be essential. While this specific information is absent, the most recent IPCA inflation rate available indicates 0.88% in March 2026 ^[2]. Similarly, the latest IBGE national unemployment rate shows 5.4% for the quarter ending in January 2026 ^[3]. Due to the lack of the required data for the specified three months, the requested pre-election trends cannot be determined.

Neither Tarcísio de Freitas nor Ronaldo Caiado consistently poll above 15%. The available state-level polls from Quaest or IPEC provide no direct evidence that these right-leaning candidates are consistently polling above 15% in candidate roles in Bahia and Pernambuco. While Tarcísio de Freitas was mentioned in a Quaest research concerning Bahia, it was in the context of his evaluation, not as a candidate's polling performance. In this survey, Tarcísio received a 41% positive evaluation and 14% negative evaluation in Bahia ^[1]. Ronaldo Caiado is not mentioned in any of the provided sources regarding polling in Bahia or Pernambuco.

Other right-leaning figures demonstrate significant support in presidential polls for these states. For example, Jair Bolsonaro exceeded 15% in some presidential election polls, with an Ipec poll showing him at 20% in Bahia and 27% of valid votes in Pernambuco ^[2]. A Genial/Quaest poll for a hypothetical 2026 second-round presidential election in Bahia also indicated Flávio Bolsonaro with 38% against Lula's 45% ^[4]. However, these figures are for different candidates and elections than those specified in the original query, which focused on Tarcísio de Freitas and Ronaldo Caiado as state-level candidates.

Leading candidates consistently emerge in Brazil's 2026 presidential election polls. In the final week of polling, Luiz Inácio Lula da Silva, Flávio Bolsonaro, and Simone Tebet are consistently identified as the leading candidates ^[1]. An April 2026 BTG/Nexus poll showed these three with raw vote shares of 46%, 34%, and 7%, respectively. Other notable candidates in the same poll included Ciro Gomes at 4%, Marina Silva at 2%, and André Janones at 1% ^[3].

The collective vote share for other candidates varies across recent polls. When adjusted for valid votes, the collective share for candidates beyond these top three frontrunners, such as Ciro Gomes, Marina Silva, and André Janones, ranges between approximately 3.36% and 7.45% based on April 2026 surveys ^[1]. Specifically, the BTG/Nexus poll indicated roughly 7.45% of valid votes for these 'other' candidates, while the AtlasIntel poll suggested approximately 3.36% when accounting for minor candidates ^[1].

Minor candidates' collective vote share does not impede a first-round victory. This aggregate percentage of valid votes for candidates other than the top three frontrunners remains below the 10% threshold, which would make a first-round victory for any single candidate mathematically difficult ^[1]. Consequently, current projections suggest that a first-round win for a leading candidate is not precluded by the collective vote share of minor candidates ^[1].