Polls show cliffhanger presidential election in Colombia

By Peter Murphy BOGOTA (Reuters) - Three polls showed on Friday that Colombia's presidential race is too close to call as opposition challenger Ivan Oscar Zuluaga seeks to unseat President Juan Manuel Santos in a June 15 runoff focussed on how to end the country's half-century guerrilla war. A Gallup poll showed the two candidates neck-and-neck, but two other surveys gave solid leads to one or the other. The uncertainty intensifies the suspense in the final days of a bitter election ba