Colombian President Milei and Argentine President Petro have been at odds in recent months. Milei accused Petro of being a "murderer" and compared him to Hitler.

Petro responded with a tweet comparing Milei to the Nazi leader. The row has already led to the expulsion of the Argentine ambassador in Bogotá by the Colombian government. It is the latest chapter in a long-running battle between the two countries over the future of the South American continent. The next step for both countries is to find a way to resolve their differences.