Here's David Henderson correcting a common mistake. Corporations aren't allowed to give money to candidates directly. Tracing money in politics is wickedly difficult, but I'm struck by the disproportionate representation of labor unions in big-money politics. At the very least, this suggests that people deriding opposition to the President's health care plan as an elaborate corporation-funded-and-directed "astroturf" movement need to check their premises--particularly since Big Pharma, insurance companies, and Walmart are in bed with the administration on this issue.