Opinion polling for the Brazilian presidential election, 2010

Dilma Rousseff
PT
José Serra
PSDB
Marina Silva
PV

Opinion polling in the Brazilian presidential election, 2010 began as soon as 2008. The main nationwide polling institutes are Datafolha, IBOPE, Vox Populi, and Sensus. From 1 January 2010 to the election day, as required by the electoral law, all polls were registered within the Supreme Electoral Court database.[1]

Election information

The first round of the 2010 Brazilian presidential election was held on October 3, as part of the country's general election, with a second round between the two leading candidates on October 31. That happened because under Brazilian law, if none of the candidates receives more than a half of the valid votes, a run-off is held four weeks after the first round.[2] The leading candidate, Dilma Rousseff, received 46.9% of the first-round vote, thereby making a second round necessary.

In the election, Brazilian citizens eligible to vote chose their successor to then-President Luiz Inácio Lula da Silva, of the democratic socialist/social democratic Workers' Party. According to the Constitution, the President is elected directly to a four-year term, with a limit of two terms. Lula was hence ineligible for a third term, since he was elected in 2002 and re-elected in 2006.[3] The 2010 election marked the first time since the end of the military dictatorship that Lula was not a candidate for the presidency.[4]

Candidates overview

Since the earliest polls for president, former São Paulo Governor José Serra candidate for the center-right[5] opposition group led by the centrist/Third Way[6][7] Social Democratic Party was ahead of Dilma Rousseff, pre-candidate for the ruling center-left bloc led by the Workers' Party. Rousseff, however, increased her popularity greatly, rising from 3% in March 2008 to 30% in March 2010. On the May 8, 2010 poll by Vox Populi, she finally surpassed Serra, achieving 37% of the voting intention.

Another potential candidate for the ruling center-left group was Ciro Gomes from the Brazilian Socialist Party,[6] who lost his comfortable second place in polls to Rousseff in May 2009. After that, he maintained an average of 12% of voting intention. On April 27, 2010, Gomes' party declined to launch his candidacy, instead supporting Rousseff.[8] In the left-wing opposition group, Socialism and Freedom Party's Heloísa Helena was the most likely candidate, but her name was withdrawn from polling after she decided to run for a seat in the Senate for Alagoas.[9] Plínio de Arruda Sampaio was her party's candidate for president.[9] Almost simultaneously, Marina Silva left the Workers' Party and joined the Green Party to run for president.[10] Prior to her candidature, she was well-known internationally as a defender of the Amazon Rainforest, but was less known in her native Brazil.[6]

Polls

It should be noted that the results displayed in this article excludes results for spontaneous polls (in which cards with the names of likely candidates are not presented to researched voters), due to the significant amount of voters that would vote on Luiz Inácio Lula da Silva. By law, leaders of all stances of the Executive branch can only be re-elected once.

On September, Vox Populi institute began an unprecedented tracking poll for president, which was intended to last for 36 days until October 2.

Nationwide

Graphic representation of polls up to September 29, 2010.
Date conducted Institute José Serra Dilma Rousseff Ciro Gomes Heloísa Helena Marina Silva Others / None / Undecided Lead
October 31, 2010 Election Results (2nd round) 43.9% 56.1%
12.2%
October 30, 2010 Vox Populi[11] 39% 51%
10% 12%
October 29–30, 2010 Datafolha[12] 41% 51%
8% 10%
October 28–29, 2010 Sensus[13] 37.6% 50.3%
12% 12.7%
October 28, 2010 Datafolha[14] 40% 50%
10% 10%
October 27–30, 2010 Ibope[15] 40% 52%
8% 12%
October 27, 2010 Datafolha[16] 38% 49%
13% 11%
October 26–28, 2010 Ibope[17] 39% 52%
9% 13%
October 23–25, 2010 Sensus[18] 36.7% 51.9%
11.4% 15.2%
October 23–24, 2010 Vox Populi[19] 38% 49%
13% 11%
October 21, 2010 Datafolha[20] 40% 50%
10% 10%
October 18–19, 2010 Sensus[21] 41,8% 46,8%
11.4% 5%
October 17–20, 2010 Ibope[22] 40% 51%
9% 11%
October 15–17, 2010 Vox Populi[23] 39% 51%
10% 12%
October 14–15, 2010 Datafolha[24] 41% 47%
12% 6%
October 11–13, 2010 Sensus[25] 42.7% 46.8%
10.5% 4.1%
October 11–13, 2010 Ibope[26] 43% 49%
8% 6%
October 10–11, 2010 Vox Populi[27] 40% 48%
12% 8%
October 8, 2010 Datafolha[28] 41% 48%
11% 7%
October 3, 2010 Election Results (1st round) 32.6% 46.9%
19.3% 1.2% 14.3%
October 2, 2010 Vox Populi[29] 26% 47%
14% 13% 21%
October 1–2, 2010 Ibope[30] 29% 47%
16% 8% 18%
October 1–2, 2010 Datafolha[31] 29% 47%
16% 8% 18%
October 1, 2010 Vox Populi[29] 27% 48%
12% 13% 21%
September 30, 2010 Vox Populi[29] 26% 49%
12% 13% 23%
September 29, 2010 Vox Populi[29] 26% 49%
12% 13% 23%
September 28–29, 2010 Datafolha[32] 28% 47%
14% 11% 19%
September 28, 2010 Vox Populi[29] 25% 49%
12% 14% 24%
September 27, 2010 Datafolha[33] 28% 46%
14% 12% 18%
September 27, 2010 Vox Populi[29] 24% 49%
13% 14% 25%
September 26–28, 2010 Sensus[34] 25.6% 47.5%
11.6% 15.3% 21.9%
September 26, 2010 Vox Populi[29] 24% 49%
12% 15% 25%
September 25–26, 2010 Ibope[35] 27% 50%
13% 10% 23%
September 25, 2010 Vox Populi[29] 23% 50%
11% 16% 27%
September 24, 2010 Vox Populi[29] 24% 50%
10% 16% 26%
September 23, 2010 Vox Populi[29] 24% 51%
10% 15% 27%
September 22, 2010 Vox Populi[29] 24% 51%
10% 15% 27%
September 21–23, 2010 Ibope[36] 28% 50%
12% 10% 22%
September 21–22, 2010 Datafolha[37] 28% 49%
13% 10% 21%
September 21, 2010 Vox Populi[29] 25% 52%
9% 14% 27%
September 20, 2010 Vox Populi[29] 23% 53%
9% 15% 30%
September 19, 2010 Vox Populi[29] 24% 53%
9% 14% 29%
September 18, 2010 Vox Populi[29] 24% 51%
9% 16% 27%
September 17, 2010 Vox Populi[29] 23% 51%
9% 17% 28%
September 16, 2010 Vox Populi[29] 23% 51%
9% 17% 28%
September 15, 2010 Vox Populi[29] 22% 52%
9% 17% 30%
September 14–17, 2010 Ibope[38] 25% 51%
11% 13% 26%
September 14, 2010 Vox Populi[29] 22% 53%
8% 17% 31%
September 13–15, 2010 Datafolha[39] 27% 51%
11% 11% 24%
September 13, 2010 Vox Populi[29] 22% 54%
8% 16% 32%
September 12, 2010 Vox Populi[29] 23% 53%
9% 15% 30%
September 11, 2010 Vox Populi[29] 23% 52%
9% 16% 29%
September 10–12, 2010 Sensus[40] 26.4% 50.5%
8.9% 14.2% 24.1%
September 10, 2010 Vox Populi[29] 22% 53%
9% 16% 31%
September 9, 2010 Vox Populi[29] 21% 53%
9% 17% 32%
September 8–9, 2010 Datafolha[41] 27% 50%
11% 12% 23%
September 8, 2010 Vox Populi[29] 21% 54%
9% 15% 33%
September 7, 2010 Vox Populi[29] 21% 56%
8% 15% 35%
September 6, 2010 Vox Populi[29][42] 22% 55%
8% 15% 33%
September 5, 2010 Vox Populi[29][42] 24% 53%
8% 15% 29%
September 4, 2010 Vox Populi[43] 24% 53%
8% 15% 29%
September 3, 2010 Vox Populi[44] 24% 52%
8% 16% 28%
September 2–3, 2010 Datafolha[45] 28% 50%
10% 12% 22%
September 2, 2010 Vox Populi[46] 25% 51%
9% 15% 26%
September 1, 2010 Vox Populi[29][42] 25% 51%
9% 15% 26%
August 31-September 2, 2010 Ibope[47] 27% 51%
8% 14% 24%
August 24–26, 2010 Ibope[48] 27% 51%
7% 15% 24%
August 23–24, 2010 Datafolha[49] 29% 49%
9% 13% 20%
August 20–22, 2010 Sensus[50] 28.1% 46%
8.1% 17.8% 17.9%
August 20, 2010 Datafolha[51] 30% 47%
9% 14% 17%
August 12–15, 2010 Ibope[52] 32% 43%
8% 17% 11%
August 9–12, 2010 Datafolha[53] 33% 41%
10% 16% 8%
August 7–10, 2010 Vox Populi[54] 29% 45%
8% 18% 16%
August 2–5, 2010 Ibope[55] 34% 39%
8% 19% 5%
July 31-August 2, 2010 Sensus[56] 31.6% 41.6%
8.5% 18.3% 10%
July 26–29, 2010 Ibope[57] 34% 39%
7% 19% 5%
July 20–23, 2010 Datafolha[57] 37% 36%
10% 17% 1%
July 17–20, 2010 Vox Populi[57] 33% 41%
8% 17% 8%
June 30-July 1, 2010 Datafolha[57] 39% 38%
10% 12% 1%
June 27–30, 2010 Ibope[57] 39% 39%
10% 13% Tie
June 24–26, 2010 Vox Populi[58] 35% 40%
8% 17% 5%
June 19–21, 2010 Ibope[59] 35% 40%
9% 16% 5%
May 31-June 3, 2010 Ibope[60] 37% 37%
9% 17% Tie
May 20–21, 2010 Datafolha[61] 37% 37%
12% 14% Tie
May 10–14, 2010 Sensus[62] 33.2% 35.7%
8% 17.3% 2.5%
May 8–13, 2010 Vox Populi[63] 35% 38%
7% 22% 3%
April 15–16, 2010 Datafolha[64] 38% 28% 9%
10% 15% 10%
April 13–16, 2010 Ibope[65] 36% 29% 8%
8% 19% 7%
April 5–9, 2010 Sensus[66] 32.7% 32.4% 10.1%
8.1% 16.7% 0.3%
March 30–31, 2010 Vox Populi[67] 34% 31% 10%
5% 20% 3%
March 25–26, 2010 Datafolha[68] 36% 27% 11%
8% 18% 9%
March 6–10, 2010 Ibope[69] 35% 30% 11%
6% 18% 5%
February 24–25, 2010 Datafolha[70] 32% 28% 12%
8% 19% 4%
February 6–9, 2010 Ibope[71] 36% 25% 11%
8% 20% 11%
January 25–29, 2010 Sensus[72] 33.2% 27.8% 11.9%
6.8% 20.3% 5.4%
January 14–17, 2010 Vox Populi[73] 34% 27% 11%
9% 19% 7%
December 14–18, 2009 Datafolha[74] 37% 23% 13%
8% 19% 14%
November 26–30, 2009 Ibope[75] 38% 17% 13%
6% 25% 21%
November 23, 2009 Sensus[76] 31.8% 21.7% 17.5%
5.9% 23.1% 10.1%
November 11, 2009 Vox Populi[77] 36% 19% 13% 6% 3% 23% 17%
September 8, 2009 Sensus[78] 39.5% 19%
9.7% 4.8% 27% 20.5%
August 18, 2009 Vox Populi[79] 30% 21% 17% 12%
20% 9%
August 16, 2009 Datafolha[80] 38% 17% 14% 12% 3% 18% 21%
June 9, 2009 Ibope[81] 38% 18% 12% 7%
25% 20%
May 28, 2009 Datafolha[82] 38% 16% 15% 10%
21% 22%
March 19, 2009 Datafolha[82] 41% 11% 16% 11%
21% 25%
November 28, 2008 Datafolha[82] 41% 8% 15% 14%
21% 26%
March 27, 2008 Datafolha[82] 38% 3% 20% 14%
25% 18%

Regional

Central-West/North*
Date conducted Institute[57] José Serra Dilma Rousseff Ciro Gomes Marina Silva Others / None / UndecidedLead
September 21–22, 2010 Datafolha 30% 46% 16% 8% 16% over Serra
September 14–16, 2010 Ibope 30% 46% 13% 11% 16% over Serra
September 13–15, 2010 Datafolha 28% 49% 13% 10% 21% over Serra
September 8–9, 2010 Datafolha 29% 47% 14% 10% 18% over Serra
September 2–3, 2010 Datafolha 29% 51% 10% 10% 22% over Serra
August 31-September 2, 2010 Ibope 25% 55% 8% 12% 30% over Serra
August 24–26, 2010 Ibope 24% 56% 9% 11% 32% over Serra
August 23–24, 2010 Datafolha 29% 50% 8% 13% 21% over Serra
August 20, 2010 Datafolha 27% 50% 12% 11% 23% over Serra
August 12–15, 2010 Ibope 41% 33% 9% 17% 8% over Serra
August 9–12, 2010 Datafolha 33% 43% 11% 13% 10% over Serra
July 26–29, 2010 Ibope 33% 40% 8% 19% 7% over Serra
July 20–23, 2010 Datafolha 33% 40% 10% 17% 7% over Serra
June 30-July 1, 2010 Datafolha 38% 42% 8% 12% 4% over Serra
June 27–30, 2010 Ibope 41% 33% 9% 17% 8% over Dilma
May 31-June 3, 2010 Ibope 31% 43% 11% 15% 12% over Serra
May 20–21, 2010 Datafolha 40% 34% 14% 12% 6% over Dilma
April 15–16, 2010 Datafolha 39% 30% 6% 12% 13% 9% over Dilma
March 25–26, 2010 Datafolha 34% 29% 9% 10% 18% 5% over Dilma
February 24–25, 2010 Datafolha 32% 29% 11% 13% 16% 3% over Dilma
December 14–18, 2010 Datafolha 38% 24% 13% 9% 16% 14% over Dilma
(*) The Central-West and North regions are counted as one macroregion due to their low population density.
Northeast
Date conducted Institute[57] José Serra Dilma Rousseff Ciro Gomes Marina Silva Others / None / UndecidedLead
September 21–22, 2010 Datafolha 20% 63% 9% 8% 43% over Serra
September 14–16, 2010 Ibope 16% 66% 7% 11% 50% over Serra
September 13–15, 2010 Datafolha 18% 65% 7% 10% 47% over Serra
September 8–9, 2010 Datafolha 18% 63% 8% 11% 45% over Serra
September 2–3, 2010 Datafolha 20% 61% 6% 13% 41% over Serra
August 31-September 2, 2010 Ibope 18% 65% 6% 11% 47% over Serra
August 24–26, 2010 Ibope 20% 66% 5% 9% 46% over Serra
August 23–24, 2010 Datafolha 21% 60% 6% 13% 39% over Serra
August 20–22, 2010 Sensus[50] 19.8% 62.1% 6.4% 11.1% 42.3% over Serra
August 20, 2010 Datafolha 22% 60% 5% 12% 38% over Serra
August 12–15, 2010 Ibope 24% 53% 6% 17% 29% over Serra
August 9–12, 2010 Datafolha 25% 49% 8% 18% 25% over Serra
July 26–29, 2010 Ibope 25% 49% 5% 21% 25% over Serra
July 24–26, 2010 Vox Populi 27% 52% 5% 17% 25% over Serra
July 20–23, 2010 Datafolha 29% 41% 9% 20% 12% over Serra
June 30-July 1, 2010 Datafolha 30% 46% 7% 17% 16% over Serra
June 27–30, 2010 Ibope 30% 50% 7% 14% 20% over Serra
May 31-June 3, 2010 Ibope 27% 47% 9% 17% 20% over Serra
May 20–21, 2010 Datafolha 33% 44% 18% 15% 11% over Serra
May 8–13, 2010 Vox Populi 45% 30% 4% 21% 15% over Serra
April 15–16, 2010 Datafolha 27% 33% 14% 10% 16% 6% over Serra
March 30–31, 2010 Vox Populi 26% 40% 13% 5% 16% 14% over Serra
March 25–26, 2010 Datafolha 25% 35% 14% 6% 20% 10% over Serra
February 24–25, 2010 Datafolha 22% 36% 15% 6% 22% 14% over Serra
December 14–18, 2009 Datafolha 28% 31% 14% 7% 20% 3% over Serra
South
Date conducted Institute[57] José Serra Dilma Rousseff Ciro Gomes Marina Silva Others / None / UndecidedLead
September 21–22, 2010 Datafolha 35% 43% 10% 12% 8% over Serra
September 14–16, 2010 Ibope 35% 42% 10% 13% 7% over Serra
September 13–15, 2010 Datafolha 34% 42% 9% 15% 8% over Serra
September 8–9, 2010 Datafolha 35% 43% 9% 13% 8% over Serra
September 2–3, 2010 Datafolha 31% 44% 9% 16% 13% over Serra
August 31-September 2, 2010 Ibope 35% 44% 5% 16% 9% over Serra
August 23–24, 2010 Datafolha 36% 43% 7% 14% 7% over Serra
August 20–22, 2010 Sensus[50] 47.8% 35.7% 6.9% 9.3% 12.1% over Dilma
August 20, 2010 Datafolha 40% 38% 10% 12% 2% over Dilma
August 12–15, 2010 Ibope 44% 35% 8% 13% 9% over Dilma
August 9–12, 2010 Datafolha 41% 34% 8% 17% 7% over Dilma
July 26–29, 2010 Ibope 46% 31% 5% 17% 15% over Dilma
June 24–26, 2010 Vox Populi 44% 33% 8% 15% 11% over Dilma
July 20–23, 2010 Datafolha 45% 32% 9% 13% 13% over Dilma
June 30-July 1, 2010 Datafolha 50% 32% 8% 11% 18% over Dilma
June 27–30, 2010 Ibope 45% 37% 9% 10% 8% over Dilma
May 31-June 3, 2010 Ibope 46% 26% 6% 21% 20% over Dilma
May 20–21, 2010 Datafolha 38% 35% 12% 14% 3% over Dilma
May 8–13, 2010 Vox Populi 45% 30% 8% 16% 15% over Dilma
April 15–16, 2010 Datafolha 45% 25% 6% 8% 16% 20% over Dilma
March 30–31, 2010 Vox Populi 33% 33% 7% 3% 25% 0%
March 25–26, 2010 Datafolha 48% 20% 7% 6% 18% 28% over Dilma
February 24–25, 2010 Datafolha 38% 24% 9% 6% 23% 14% over Dilma
December 14–18, 2010 Datafolha 39% 19% 12% 7% 23% 20% over Dilma
Southeast
Date conducted Institute[57] José Serra Dilma Rousseff Ciro Gomes Marina Silva Others / None / UndecidedLead
September 21–22, 2010 Datafolha 30% 44% 16% 10% 14% over Serra
September 14–16, 2010 Ibope 24% 48% 14% 15% 24% over Serra
September 13–15, 2010 Datafolha 29% 46% 14% 11% 17% over Serra
September 8–9, 2010 Datafolha 29% 46% 13% 12% 17% over Serra
September 2–3, 2010 Datafolha 33% 44% 12% 11% 11% over Serra
August 31-September 2, 2010 Ibope 31% 44% 10% 15% 13% over Serra
August 24–26, 2010 Ibope 30% 44% 8% 18% 14% over Serra
August 23–24, 2010 Datafolha 32% 44% 11% 13% 12% over Serra
August 20–22, 2010 Sensus[50] 27.6% 39.2% 9.7% 21.8% 11.6% over Serra
August 20, 2010 Datafolha 33% 42% 10% 15% 9% over Serra
August 12–15, 2010 Ibope 32% 41% 10% 17% 9% over Serra
August 9–12, 2010 Datafolha 35% 37% 13% 15% 2% over Serra
July 26–29, 2010 Ibope 35% 37% 9% 19% 2% over Serra
July 24–26, 2010 Vox Populi 37% 34% 9% 21% 3% over Dilma
July 20–23, 2010 Datafolha 40% 33% 12% 15% 7% over Dilma
June 30-July 1, 2010 Datafolha 43% 33% 13% 11% 10% over Dilma
June 27–30, 2010 Ibope 41% 34% 12% 14% 7% over Dilma
May 31-June 3, 2010 Ibope 41% 33% 10% 16% 8% over Dilma
May 20–21, 2010 Datafolha 40% 33% 12% 15% 7% over Dilma
May 8–13, 2010 Vox Populi 35% 36% 9% 20% 1% over Serra
April 15–16, 2010 Datafolha 42% 24% 9% 10% 15% 18% over Dilma
March 30–31, 2010 Vox Populi 39% 26% 10% 5% 21% 13% over Dilma
March 25–26, 2010 Datafolha 40% 24% 10% 9% 16% 16% over Dilma
February 24–25, 2010 Datafolha 38% 24% 12% 9% 16% 14% over Dilma
December 14–18, 2009 Datafolha 41% 19% 12% 9% 18% 22% over Dilma

References

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  45. (Portuguese) "Dilma mantém 51% e Serra, 25%, segundo pesquisa diária Vox Populi". e-BAND. September 2, 2010.
  46. (Portuguese) "Nova pesquisa Ibope mantém Dilma com 24 pontos na frente de Serra". Correio Braziliense. September 3, 2010.
  47. (Portuguese) "Dilma tem 51%, e Serra, 27%, aponta Ibope". G1. August 28, 2010.
  48. (Portuguese) Rodrigues, Fernando. "Dilma abre 20 pontos e já ultrapassa Serra em SP e no RS, diz Datafolha". Folha de S. Paulo. August 26, 2010.
  49. 1 2 3 4 (Portuguese) Campanerut, Camila. "Pesquisa CNT/Sensus: Dilma tem 46% das intenções de voto; Serra, 28,1%". BOL. August 24, 2010.
  50. (Portuguese) Folha de S. Paulo. "Dilma abre 17 pontos sobre Serra e venceria no primeiro turno". Agora. August 21, 2010.
  51. (Portuguese) EFE. "Dilma abre 11 pontos sobre Serra em pesquisa Ibope". Terra. August 16, 2010.
  52. (Portuguese) Dias, Marina, Caitano, Adriana, and Melo, Fernando. "Datafolha: Dilma tem 41% contra 33% de José Serra". Veja. August 13, 2010.
  53. (Portuguese) "Vox Populi aponta vantagem de 16 pontos de Dilma sobre Serra". G1. August 17, 2010.
  54. (Portuguese) Agência EFE. "Dilma segue na liderança em nova pesquisa Ibope". European Pressphoto Agency. August 6, 2010.
  55. (Portuguese) Borges, Laryssa. "CNT: Serra vence Dilma apenas no Sul e entre ricos e escolarizados". Terra. August 5, 2010.
  56. 1 2 3 4 5 6 7 8 9 Poll tracker at UOL Eleições
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  58. (Portuguese) "CNI/Ibope: Dilma lidera pesquisa pela 1ª vez com 40%". A Tarde. June 23, 2010.
  59. (Portuguese) "Pesquisa Ibope mostra Dilma e Serra empatados em 37%". G1. June 5, 2010.
  60. (Portuguese)
  61. (Portuguese) G1. "CNT/Sensus mostra Dilma com 35,7% e Serra com 33,2%". G1. May 17, 2010.
  62. (Portuguese) Sassine, Vinícius. "Pela primeira vez, Dilma passa Serra em pesquisa de intenção de votos". Correio Braziliense. May 15, 2010.
  63. (Portuguese) Freitas, Tatiana. "Datafolha mostra Serra com 38% e Dilma com 28%". O Estado de S. Paulo. April 17, 2010.
  64. (Portuguese) "Ibope divulga nova pesquisa sobre intenção de voto para a Presidência". Jornal Floripa. April 23, 2010.
  65. (Portuguese) Folha Online. "Pesquisa Sensus aponta empate entre Serra e Dilma". BOL. April 13, 2010.
  66. (Portuguese) Jorge, Eliano. "Vox Populi: Serra tem 34%, contra 31% de Dilma". Terra Magazine. April 3, 2010.
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  68. "Brazil’s Rousseff is Becoming a Stronger Contender". Angus Reid Global Monitor. March 31, 2010.
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  73. "Rousseff Grows, Serra Stable in Brazil". Angus Reid Global Monitor. January 10, 2009.
  74. "Serra Maintains Significant Lead in Brazil". Angus Reid Global Monitor. December 10, 2009.
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