If you haven't seen the NRA's ad questioning the President's stance on armed guards in schools you need to check it out. Even if you think armed guards in all schools are a good idea you have to wonder which genius at the NRA decided it was a good idea to take this tack.
Update 1/18/13: So it ends up that the NRA's assertion is false on factual grounds too. Sidwell Friends, where the Presidents daughters go to school, doesn't employ any armed security guards. From the Atlantic Wire:
An erroneous report on Breitbart.com, the conservative activist news website, led NRA officials to believe that Sidwell Friends employs armed guards. (Breitbart seems to have misread a job posting for a security officer.) The NRA even appropriated Breitbart's argument: that the existence of such guards at an elite private school reveals Obama as an out-of-touch elitist, unaware of his own hypocrisy.
It would be fun to break down exactly how stupid the ad is, but it's even more fun to watch Jon Stewart do it: