Colombia’s election will go to a runoff between two opposing anti-establishment candidates on 19 June after voters on Sunday were unable to pick a president outright. Gustavo Petro, a leftist former guerrilla and onetime mayor of Bogotá, won the largest share of the vote, with 40%, but fell short of the 50% required to win outright and prevent a second round. Petro’s rival in the runoff will be Rodolfo Hernández, a business magnate and social media firebrand, who is viewed as a conservative, populist outsider.