http://www.addictinginfo.org/2015/02/21/koch-67-million-dollars/
"It is no secret that the Charles and David Koch funnel millions of dollars into elections. The billionaire brothers are by no means the only people influencing votes and public perceptions about critical issues such as, climate change, income inequality, and health care reform. They are however, some of the most egregious participants in the oligarchical takeover of American democracy."