Conversation so far:
What was the relation between Duncan Hunter and initial election and re-election?
In 1980, Duncan Hunter was recruited to run for Congress in what was then the 42nd District against 18-year incumbent Democrat Lionel Van Deerlin.
Did Duncan Hunter win the election against Lionel Vandeerlin in 1980 for the 42nd District?
Duncan Hunter narrowly defeated Lionel Van Deerlin.
Who was Duncan Hunter's opponent?
In 1980, Duncan Hunter was recruited to run for Congress in what was then the 42nd District against 18-year incumbent Democrat Lionel Van Deerlin.
Does Duncan Hunter have other opponents besides Lionel Van Deerlin in the 1980 election for the 42nd district?
Who was the incumbent when Duncan Hunter ran for the election?
In 1980, Duncan Hunter was recruited to run for Congress in what was then the 42nd District against 18-year incumbent Democrat Lionel Van Deerlin.

Question: For how long was he in office?
Self-contained rewrite: For how long was Duncan Hunter in office for Congress?