Center for Responsive Politics

The Iowa Republican has less than $19,000 in reported cash on hand.
And she did it without corporate PAC contributions.
Democrats have raised unprecedented sums for the Nov. 6 elections.
The companies have also been involved in high-profile controversies in the U.S.
By Frank Bass, MapLight More than five dozen congressmen who have retired or plan to retire next year have raised at least
Outside financiers are already beginning to wield their influence.
If Clinton was bought by investment bankers, hedge fund managers and the like, we'd expect to see them donating in large numbers to her campaign committee; even though individual contributions to that account are limited to $2,700 for the primary and another $2,700 for the general election, they are a good measure of which parts of the economy are really drawn to a candidate.
The real purpose of an individual-candidate Super PAC is to circumvent candidate contribution limits. Wealthy donors, corporations and other contributors use these Super PACs as vehicles to make unlimited contributions to directly support the candidate backed by the Super PAC.
New regulations must establish a clearly defined, restrictive limit on how much campaign activity a group can engage in and still be eligible for 501(c)(4) tax status.