June 19 (UPI) -- Colombia will hold one of its most polarized presidential elections in recent years on Sunday as conservative businessman Abelardo de la Espriella and leftist Sen. Iván Cepeda face off in a runoff that will test the next government's ability to address fiscal pressures, political fragmentation and security challenges. More than 40 million Colombians are eligible to vote to choose the successor to President Gustavo Petro in a contest between two sharply different political