Which political party is Jack Arnold described as supporting?

Jack Arnold is described as supporting the Republican Party. The character is specifically portrayed as a Republican who voted for Richard Nixon in the 1968 and 1972 presidential elections.

That political identity fits Jack’s role in the series. He represents an older, more conservative generation shaped by the Great Depression and military service, while his daughter Karen embraces a hippie, countercultural outlook. Their disagreements are part of the show’s larger portrait of family life during a period of major political and social change.

The detail is sometimes blurred because Jack’s politics are presented through characterization and family conflict rather than through a sustained political storyline. The show does not present him as an Independent, Libertarian, or Democrat. His support for Nixon and his stated Republican identity make “Republican” the fair quiz answer.