Conversation so far:
What are Joe Biden's characteristics as Senator?
During his years as a senator, Biden amassed a reputation for loquaciousness, with his questions and remarks during Senate hearings being known as long-winded
Was Joe Biden likable as Senator?
Does Joe Biden have a lot of friends in politics?
Yes; some of Joe Bidens policitian friends have included John McCain, Chris Dodd, President Barack Obama
When did Joe Biden become Senator?
Joe Biden was sworn into Senate office on January 5, 1973

Question: What State was he the Senator for?
Self-contained rewrite: What state was Joe Biden a Senator for?