I have no idea what his politics were, probably liberal but he sure could sing.
He was a Democrat. Supported Jimmy Carter, and was critical of President Ronald Reagan. He also didn’t like the NRA.
He was a typical hippie/new age/environmentalist wacko. One of his songs, Calypso, was a paean to the uber-new ager Jacques Cousteau.
But yes, his music was beautiful, and most of it (as I recall) was not political.