MS NOW

GOP Senate candidates credit Koch backing

The question for candidates like Gardner, Cotton, and Ernst: "If you're in a position to win because of the Kochs' network, how do you intend return the favor?"

David Koch
Americans for Prosperity Foundation Chairman David Koch addresses attendees of the Defending the American Dream Summit in Orlando, Fla., Friday, Aug. 30, 2013.AP

Steve Benen is a producer for "The Rachel Maddow Show," the editor of MaddowBlog and an MS NOW political contributor. He's also the bestselling author of "Ministry of Truth: Democracy, Reality, and the Republicans' War on the Recent Past."