Conversation so far:
When did Rick Santorum get into politics?
Rick Santorum first became actively involved in politics in the 1970s through volunteering for Senator John Heinz, a Republican from Pennsylvania.
What role was Rick Santorum in 1995?
Rick Santorum served in the United States Senate representing Pennsylvania from 1995 to 2007.
What was Rick Santorum's first notable accomplishment as a senator?
In 1996, Rick Santorum served as Chairman of the Republican Party Task Force on Welfare Reform, and contributed to legislation that became the Personal Responsibility and Work Opportunity Act.

Question: What was his margin of victory on re-election?
Self-contained rewrite: What was Rick Santorum's margin of victory on re-election as senator?