Conversation so far:
When did Miller become gorvernor
Miller was elected governor of Georgia in 1990
Who did Zell Miller run against for governorship of Georgia?
Miller was elected governor of Georgia in 1990, defeating Republican Johnny Isakson after defeating Atlanta Mayor Andrew Young and future Governor Roy Barnes in the primary.
Who worked in Zell Miller's campaign
James Carville was Miller's campaign manager.

Question: Was he a republican or democrat
Self-contained rewrite: Was Zell Miller a republican or democrat?