Who ordered Tortsky's assassination?

Leon Trotsky was assassinated on August 20, 1940, in Mexico City by Ramón Mercader, a Soviet agent. The assassination was ordered by Joseph Stalin, who viewed Trotsky as a significant political rival and a threat to his leadership in the Soviet Union. Trotsky had been a key figure in the Russian Revolution and a vocal critic of Stalin's policies, leading to a long-standing vendetta against him.