Conversation so far:
How was Bob Graham as a U.S.
Senator?
Graham was then elected to the U.S.
Senate.
Was there any controversy involving him as a U.S Senator?
CANNOTANSWER.
What happened during his time as a U.S.
Senator?
Graham served on the environment and finance committees, and was a founding member of the Democratic Leadership Council.
Was Graham very popular or well liked by many?
Graham had served 38 consecutive years in public office.
Did he make any changes?
received the highest civilian recognition for a non-Spaniard by King Juan Carlos.

Question: What other things happened while he was U.S Senator?
Self-contained rewrite: What other things happened while Bob Graham was U.S Senator, aside from receiving the highest civilian recognition for a non-Spaniard by King Juan Carlos?