FEC
The Influence of a Few: There's Been a Rapid Rise in the Number of Super PACs Controlled by Single Donors
Super PACS that get nearly all of their money from one donor quadrupled their share of overall fundraising in 2014.
How Political Consultants Took a Texas Oilman on a Wild Ride
The head of a Texas oil dynasty joined the parade of wealthy political donors, aiming to flip the Senate to Republicans. By the time consultants were done with him, the war chest was drained and fraud allegations were flying.