Hands down --- the Koch Brothers.
I detest this family and everything they stand for.
Americans for Prosperity is about as accurately benevolent to the average citizen as a Nazi inviting you to take a shower.
I'm so sick of these disgusting human beings, I retch whenever I see their ignorant propaganda. The blatant lies their money affords them are despicably cloaked in their very strong and accurate belief of American ignorance. Unfortunately, America is ignorant and these parasites are exploiting that ignorance to their full advantage.
I despise the Koch's. I think I speak for entire classes of people when I say that.