My first reaction when I have these thoughts (e.g., why hasn't someone brought up this particular fact to fight the battle?) is that SURELY Obama and his advisors have already discussed whether to use this particular ammunition and have decided not to for some larger strategic vision.  Is this a bad assumption?  I don't know what to think when a dem nominee doesn't immediately come back with such facts when presented with certain questions.  It's always totally frustrating to be a back-seat campaign manager!!!*

*with apologies to bobo for using his trademark triple exclamation points