Thanks mayday for the link to map light:
Maplight is a sight that tries to follow the money. I have posted the link for Senate Bill 1348 otherwise know as Immigration Reform Bill aka Shamnesty!
You will note that it doesn't have any contributors or opponents listed, this is because the bill has not been voted on yet!

http://maplight.org/map/us/bill/69133/default


and following is a link of 'minority and ethnic groups' top ten politicans:
http://maplight.org/map/us/interest/J7500