On Sunday, thousands of Colombians took to the streets in the latest rebuke of leftist President Gustavo Petro’s reform agenda. The protests are not the first against Petro since he took office 20 months ago; however, they are the largest. The protesters demonstrated in several cities, including the capital. Bolivar Plaza was crowded with protesters in front of the presidential palace in Bogota. Medical associations, opposition parties, and even some of Petro’s former allies had called on Colombians to rally against the violence that was corrupting the ongoing peace negotiations with armed gue…