Super PACs have become an increasingly popular political vehicle for outside groups, effectively replacing so-called 527 organizations, because Super PACs allow for the acceptance of unlimited individual and corporate contributions while permitting express advocacy in communications. Although 527 organizations could also raise unlimited individual and corporate contributions, they could not engage in express advocacy for fear of triggering FEC registration and the requisite contribution limits and prohibitions. The advent of the Super PAC, therefore, fundamentally changed the political landscape and such entities will likely continue to play a prominent role for many years to come.
via wileyrein.com
