Gustavo Petro, presidential candidate for the Progressivists Movement Party, center, speaks during an election night event at the party's headquarters in Bogota, Colombia, on Sunday, May 27, 2018. Nicolo Filippo Rosso/Bloomberg
Gustavo Petro, presidential candidate for the Progressivists Movement Party, center, speaks during an election night event at the party's headquarters in Bogota, Colombia, on Sunday, May 27, 2018. NicShow more

Colombia election runoff a battle of left and right