Step 1 : Introduction to the question "What song by The Beatles was originally written for a U.S. political campaign?"
The song "Come Together" by The Beatles was originally written for a U.S. political campaign. In 1969, Timothy Leary, a psychologist known for his advocacy of psychedelic drugs, launched a campaign for governor of California. John Lennon wrote "Come Together" as a campaign song for Leary, incorporating the slogan "Come together, join the party." However, Leary's campaign was short-lived due to his arrest and imprisonment on marijuana charges, and The Beatles later reworked the song, transforming it into one of their most iconic tracks.