What is the useful idiot. Who was the Manchurian candidate? In political jargon, a useful idiot is a person perceived as a propagandist for a cause whose goals they are not fully aware of, and who is used cynically by the leaders of the cause. The useful idiot could be either a well-meaning “liberal” who has affinity for Russian Soviet politics despite all atrocities committed. But conversely can also be applied to individuals who have legitimate connections with Russian apparatus….