Where does the cash come from?

2004 Election Overview: Business-Labor-Ideology Split in PAC & Individual Donations to Candidates and Parties

A fascinating chart on who gets the money. However, it is clear that the unions are spending far more than one can see here- and not really hiding it. One union admits to having a thousand full time people on the Kerry campaign. That's a whole lot of people to run an organized ground game. At 40k annually a pop (including benefits), for six months, that is 20,000x1000=$20,000,000 from that one union just in workers alone.