Leftist Colombian presidential candidate Gustavo Petro, a former guerrilla vowing to tackle grating inequality, held a big lead ahead of the May 29 vote, a poll showed late on Thursday, though center-right rival Federico Gutierrez saw an uptick in support.
Petro, who was the mayor of Bogota between 2012 and 2015, had 40.6% support, according to pollster Invamer. That is three percentage points lower than what he had in an April 22 poll.
