Published: October 23, 2012
More than two dozen people or groups have donated at least $1 million each to the new superPACs, which can raise unlimited funds to help a candidate — although without technically coordinating with that campaign. The money is largely being used to run attack ads against opponents. Here are those giving the most money, according to the Federal Election Commission.
See the whole "Million-Dollar Donors" series [Copyright 2013 NPR]