Stretched too far, this defense of “iterative” reporting can be used to excuse errors or trafficking in rumor. But that’s not the case here. Politico reported what it knew. Though the presentation of the story could have—and should have—been fairer to Cain on a couple points, what it reported has held up. And what it reported was, on its own, newsworthy.

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Greg Marx is an associate editor at CJR. Follow him on Twitter @gregamarx.