Maggots and blowflies, creatures that feast on dead human bodies, serve highly useful purposes by returning organic matter to the soil and removing potential sources of disease. So, it's possible that Chris Murphy might also be of some social utility -- although it's hard to see him as other than a self-promoting ghoul after a shooting. Even the left-leaning Politico has named Murphy, the Democrat junior senator from Connecticut, as one of "The 7 Most Shameless Attention-Seekers in Congress." And sure enough, just hours after the mass shooting at Brown University, there was Murphy on CNN's State of the Union....