Chait doesn't think that the Koch brothers care about it too much:

[T]he Kochs will happily put their money behind candidates who agree with their economic agenda but disagree with their social agenda. They will never put their money behind candidates of whom the reverse is true.

Balko protests that the Kochs gave money to fight the Patriot Act. Serwer points to the Russ Feingold race as a good test of Chait's theory and concludes that Chait is mostly correct.