Frontrunner Abelardo de la Espriella has vowed to return to full-scale military confrontation with armed groups Frontrunner Abelardo de la Espriella has vowed to return to full-scale military confrontation with armed groups Colombians go to the polls on Sunday in a presidential runoff expected to trigger to a dramatic shift in the country’s decades-long armed conflict, now at its most violent point since the landmark 2016 peace agreement between the government and most of the Revolutionary