Hundreds of thousands of Colombians took to the streets on Sunday to protest the reform agenda of the left-wing government of Gustavo Petro, whose popularity is now at an all-time low. Shouts of "Petro out!" echoed on the streets of cities across the nation. Despite rain, some 70,000 people marched in the national capital of Bogota, according to city government estimates, waving national flags and blowing on trumpets.