Colorado's top political donors, 2007-2012
"The 30 largest donors to Colorado politics spent $86 million from 2007 through 2012. This data includes includes donations to state and federal candidates, state issue committees that oppose or support ballot initiatives, federal Super PACS and 527s, which are groups created under IRS laws that act independently of candidates and their campaigns. Also included are federal independent expenditures by Super PACs for or against Colorado candidates."