Groups backed by secret donors take the lead in shaping 2016 elections - The Washington Post

http://www.washingtonpost.com/politics/groups-backed-by-secret-donors-take-the-lead-in-shaping-2016-elections/2015/07/14/e56a2572-2a3e-11e5-a5ea-cf74396e59ec_story.html?postshare=1811436968288257