Colombians are voting in a Sunday presidential runoff to determine whether the country continues on its leftist path or joins Latin America's rightward shift by electing a political outsider who has vowed to crack down on crime. After a crowded first-round election produced no winner in May, voters will choose between two runoff candidates: leftist Senator Ivan Cepeda and Abelardo De La Espriella, a right-wing lawyer and businessman with no political experience. Cepeda, 63, is vowing to