In April 2009, the
Social Renewal Party (PRS), Guinea-Bissau's main opposition party, designated its President, Kumba Ialá (who was previously President of Guinea-Bissau from 2000 to 2003), as its candidate for the presidential election. Some in the party who opposed Ialá's "system of monopoly" instead proposed the candidacy of
Baltizar Lopes Fernandes, but they were unsuccessful. Six candidates sought the presidential nomination of the African Party for the Independence of Guinea and Cape Verde (PAIGC), the ruling party. PAIGC President Carlos Gomes Junior backed Pereira. another unsuccessful candidate for the nomination was former Prime Minister
Manuel Saturnino Costa.
Zinha Vaz ran as the candidate of the Guinean Patriotic Union (UPG), and was the only female candidate in the election. Prior to the election, three of the 11 remaining candidates were considered the key contenders for the Presidency: PAIGC candidate Sanhá, PRS candidate Ialá, and independent candidate Rosa. ==Campaign==