I saw this exchange. It was pathetic. Gregory continually cast doubt on LaPierre over the chance that an armed cop at a school might not halt a shooting, and then demanded that LaPierre embrace gun control because it MIGHT stop a shooting, evidence to the contrary. Classic media double-standard.
These hoplophobic bigots like David Gregory, Piers Morgan, et al, seem to always argue from a teleological (albeit fallacious) standpoint. Self-defense and the defense of others are deontological universal Truths, and universal human Rights. There must be no subtlety here: attack me and I shall defend. I shall protect my children or make damn sure that they are protected. These truths are self-evident and ABSOLUTE.