The KOCH brothers must be stopped. They gave $40K to Scott Walker, the MAX allowed by state law. That's small potatoes compared to the $100+ million they give to other organizations. These organizations will terrify you. If the anti-union thing weren't enough, here are bigger and better reasons to stop the evil Kochs. They are trying to:
- decriminalize drugs,
- legalize gay marriage,
- repeal the Patriot Act,
- end the police state,
- cut defense spending.

Who hates the police? Only the criminals using drugs, amirite? We need the Patriot Act to allow government to go through our emails and tap our phones to catch people who smoke marijuana and put them in prison. Oh, it's also good for terrorists.
Wikipedia shows Koch Family Foundations supporting causes like:

- CATO Institute
- Reason Foundation
- cancer research ($150 million to M.I.T. - STOP THEM! KEEP CANCER ALIVE!)
- ballet (because seriously: FUCK. THAT. SHIT.)

http://en.wikipedia.org/wiki/Koch_Family_Foundations

Is philanthropy stronger in the US now than it was fifty years ago? Not a rhetorical question.