Complex sentence: In the 1970s, he was one of the most active leaders of the Libertarian Party: he was the Party's national chairman from 1974 to 1977, and managed Ed Clark's high-profile 1978 campaign to be Governor of California.
Split into simpler sentences: In the 1970s, he was one of the most active leaders of the Libertarian Party. He was the Party's national chairman from 1974 to 1977, and managed Ed Clark's high-profile 1978 campaign to be Governor of California.