Conversation so far:
How was David Vitter relevant?
Vitter has been actively involved with legislation concerning illegal immigrants.
What was his stance on immigrants?
he led a group of conservative Senators in blocking federal Immigration Legislation that would have granted a pathway to legal residence to 12 million illegal immigrants.
What else did he do with immigrants?
Vitter introduced a bill requiring banks to verify that no customer was an illegal immigrant before issuing banking or credit cards.
Did he introduce even more bills?
ten of eleven other bills in a Republican package of tough immigration enforcement measures including jail time for illegal border crossing.
Are there any other interesting aspects about this article?
The bill's defeat won Vitter national attention as the bill was supported by President George W.
Bush, John McCain, and Ted Kennedy, among others.
Why was he so rigid in his immigration stance?
CANNOTANSWER.

Question: Whats the last thing he did immigration wise?
Self-contained rewrite: Whats the last thing David Vitter did immigration wise?