Barack Obama says he doesn't deal with lobbyists. Yet, in just three years he has collected a lot of money from Fannie Mae and Freddy Mac. No doubt they didn't expect anything back when thy donated money to Obama. I'm sure they just wanted good government. One reason Congress people fight over committee assignments is because of the money that flows to the ones on those committees. That is also why they want their party to be in the majority, since people don't waste money on the powerless minority. Check out the table in this article. Hillary Clinton has also done quite well in a sort time.

http://www.opensecrets.org/news/2008/07/top-senate-recipients-of-fanni.html