Conversation so far:
what happened in 1980?
George W.H. Bush became chairman on the Executive Committee of the First International Bank in Houston
what else did George W.H. Bush do in 1980 besides becoming chairman on the Executive Committee of the First International Bank in Houston?
George W.H. Bush also spent a year as a part-time professor of Administrative Science at Rice University's Jones School of Business
was George W.H. Bush married?
George W.H. Bus was on leave from the navy, he married Barbara Pierce in Rye, New York
what did George W.H. Bush do in the navy?
George W.H. Bus was a naval aviator.
what did George W.H. bush do after  being a naval aviator in the navy?
George W.H. enrolled at Yale University
what did George W.H bush do to become more involved?
Bush began planning for a presidential run after the 1984 election, and he officially entered the 1988 Republican Party presidential primaries in October 1987

Question: who was his opponent?
Self-contained rewrite: who was George W.H. Bush's  opponent in the 1988 Republican Party presidential primaries in October 1987?