Companies spend almost three times the amount on politically motivated charitable giving than they spend trying to influence politicians through PACs.
The movement of people between industry and government is a political talking point, but how big a deal is it? Research is starting to quantify the extent of the problem.
Under the surface, there are rules that govern power sharing among rival factions and keep high-ranking individuals moving up the ladder.
The average member of Congress has, over time, become more connected to his or her peers.