By Gustavo Bonato SANTOS Brazil (Reuters) – Brazilian presidential candidate Eduardo Campos was killed in a plane crash on Wednesday, throwing the October election and local financial markets into disarray. A private jet carrying Campos and his entourage crashed in a residential area in bad weather as it prepared to land in the coastal city of Santos. Campos, 49, was running on a business-friendly platform and was in third place in polls with the support of about 10 percent of voters. While he was not expected to win the Oct. 5 vote, he was widely seen as one of Brazil’s brightest young political stars and his death instantly changes the dynamics of the race.