We only have a certain number of them and if they are all in Iraq, then its harder for us to use them in Afghanistan, ...
The real reason it's "harder for us to use them" in Afghanistan: Iraqis speak Arabic or Kurdish. The Afghanis speak Pashto, Farsi or other non-Arabic languages.
While it seems Obama's gaffes started with the first time he opened his mouth or put pen to page ( ... OK, he may be computer literate?), the majority of the U. S. Electorate might empathize with him on one or two occasions, but since he is a POLITICIAN "on the stump" ... anything he says is for the most part, posturing. He, like many before him, will say ANYTHING if it will serve his purpose.
The candidate, well ... doesn't seem too bright? More to follow.