A deeply divided electorate will choose Colombia’s next president in a run-off on Sunday that pits a progressive against a conservative outsider, with both candidates tapping into fears of renewed internal conflict in the country. Voters will choose between businessman and lawyer Abelardo de la Espriella and Iván Cepeda, a lawmaker and heir to the political movement of outgoing President Gustavo Petro, the nation’s first leftist leader. The two defeated nine other contenders in a May 31...