Colombian leftist Gustavo Petro leads the race for the country's presidency ahead of a second round of voting, having inspired his supporters to imagine a more equitable, greener country, they say.
But promises of radical change from the former M-19 rebel may now resonate less with those who want a break from Colombia's traditional political machinery: Petro's surprise rival in the June 19 run-off will be Rodolfo Hernandez - a septuagenarian who has run a populist campaign as an independent, anti-establishment maverick.
