Miller also forayed into politics and public service. From 1963 to 1965, Miller was Chairman of the Industry Advisory Council of the President's Committee on Equal Employment Opportunity. In 1966 and 1967, he was a member of the National Council on the Humanities. Miller also served in the think tank Club of Rome. In 1968, he aided Hubert Humphrey's presidential campaign as chairman of a Democratic-leaning business group. He also played a minor role in Jimmy Carter's 1976 presidential campaign. After Carter's election, Miller chaired the President's Committee on HIRE, which tried to explore the issues surrounding veteran employment.