Tetsuwan Atom - episode 43 - 21 Oct, 1963

The robot president Rag is the target of an assassin. Then Astro Boy finds out that the culprit is Dead Cross, Rag's creator. He had created Rag to run in the presidential election, but when Rag gets elected, he begins to hold a grudge against Rag. (Source: Tezuka Productions)