“What’s interesting is that Steyer alone outspent both the Koch brothers, Charles and David, in the 2014 elections by nearly 10 to 1.”
Read more: http://dailycaller.com/2016/02/08/bernie-sanders-signs-global-warming-pledge-created-by-a-billionaire-hedge-fund-manager/#ixzz3zcZCCIuT
From the Daily Caller: