Conversation so far:
How was David Vitter relevant?
David Vitter was a member of the Louisiana House of Representatives from 1992 to 1999.
What was David Vitter's stance on immigrants?
David Vitter has been actively involved with legislation concerning illegal immigrants.
What else did David Vitter do with immigrants?
In June 2007, David Vitter led a group of conservative Senators in blocking the Comprehensive Immigration Reform Act.

Question: Did he introduce even more bills?
Self-contained rewrite: Did David Vitter introduce even more bills besides blocking the Comprehensive Immigration Reform Act?