The Washington Post adds up contributions form key industries to see where the candidates are getting their cash.
The Center for Responsive Politics has analysis of lots of other industries.
- Education: Barack Obama -- $696,076
- Insurance: Christopher Dodd -- $405,550
- Telecom: John McCain -- $123,600
- Gambling: Rudy Giuliani -- $118,200
- Lobbyists: Hillary Clinton -- $234,550