People & Power - The Koch Brothers
Al Jazeera may be perceived as having bias issues with some of the nuances on reporting intra-Arab stories but even there, Al Jazeera is one of my standard sources for in-depth reading of the players in the game.
But they recently have picked up on the powerful place of the Kochs in a generation of influence buying and selling in the government of these United States. I think this is a nice review of the current issues, including interviews with the Americans for Prosperity players, such as Tim Phillips.
"Yes, we've put substantial money into Wisconsin, I won't detail numbers but it's substantial."