Conversation so far:
What was Rick Santorum's tenure in regards to?
Rick Santorum served in the United States Senate representing Pennsylvania.
How long was Rick Santorum in the United States Senate representing Pennsylvania?
Rick Santorum served in the United States Senate representing Pennsylvania from 1995 to 2007.

Question: Did he make a big impact?
Self-contained rewrite: Did Rick Santorum make a big impact in the United States Senate?