>> most guns are semiautomatic weapons that's basic technology process you want to ban all semiautomatic weapon that's enormous prohibition. you have to go and confiscate them. you'll have second amendment problems. the critics >> that's not -- most americans want a ban on semiautomatic weapons. most want a ban on. >> there is no magic solution, don. you can either. >> that doesn't mean they're going to be a good. >>s in the problem with gun controllers. you says in minor things we're suggesting useful background checks. they make no difference. or you can actually advocate something on large scale that might make a difference but you're -- but most gun controllers are afraid. >> how do you know it doesn't make a difference. >> what shooting would a universal background check what mass shooting what mass shoot shooting.