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Nixon's paranoia went up a great deal after he lost in 1960, partly because he felt the Kennedys had used dirty tricks to defeat him, he felt the Kennedys were better at dirty tricks than he was in 1960. And he was probably not wrong about that. The Kennedys played hardball. And [his brother] Bobby Kennedy was probably smarter about dirty tricks in 1960 than Richard Nixon was. I say that having written a biography of Bobby Kennedy.