During the whole Valerie Plame imbroglio, former CIA agent Larry Johnson emerged as a netroots hero for loudly sticking up for Joe Wilson and Valerie Plame, and articulating, in no uncertain terms, what he thought of the cretins that revealed her identity to score political points.

Then, during the primary, he went off the deep-end, spreading vile and unsubstantiated rumors about Obama, his wife, his church etc. Dave Weigel tells the tale.