Conversation so far:
How was Bob Graham as a U.S. Senator?
Bob Graham was then elected to the U.S. Senate in 1986, defeating incumbent Sen. Paula Hawkins.
Was there any controversy involving Bob Graham as a U.S Senator?
Bob Graham continued to oppose the Iraq War.

Question: What happened during his time as a U.S. Senator?
Self-contained rewrite: What happened during Bob Graham's time as a U.S. Senator?