Fantastic chart, very consistent with my view that politics has been utterly corrupted by dirty corporate money.
If you want to understand why the Banks and investment houses are so influential in DC, why Financial Regulation was so milquetoast (or why Deregulation occurred in the first place), look no further:
Top Corporations Aid U.S. Chamber of Commerce Campaign
ERIC LIPTON, MIKE McINTIRE and DON VAN NATTA Jr.
NYT, October 21, 2010