Because it seems more and more like a paper tiger (boldface mine):

The Sunlight Foundation released a report Thursday calculating return on investment for outside spending groups in the 2012 election based on what percentage of their spending went to races that ended up with the desired results….

The worst performers were the NRA’s super PAC and Karl Rove’s American Crossroads, with .81 percent and 1.29 percent respectively.

Maybe now we can get serious about limiting those firearms whose primary purpose is to shoot other people? Because I can snark only so much about homicide.