It is my understanding that Issa lacks the needed enforcement mechanism. Remember, Holder has been found in contempt of congress but a house committee can't do much besides issuing a "strongly worded" admonition.
Of course, I could be wrong................
That was made more complicated by the fact that Obamao exerted “executive privelege” on those requested docs involving Fast & Furious. So the whole mess is winding it’s way through federal DC courts.