Colombians will choose among a leftist promising change, a center-right candidate seen as the natural successor to the incumbent leader, and an eccentric business magnate in a presidential vote on Sunday.
Gustavo Petro, the leftist, has consistently led opinion polls, with around 40% of voting intentions. If no one secures more than 50% a run-off will take place on June 19, which surveys suggest Petro would win.
