And following passage of that bill some one will knock on your door and ask for your guns. To close the loop at a gun show would eventually lead to stopping the private sale of firearms altogether. If John is truly worried about terrorist then close the borders, start rounding up those here illegally and send them home.
The hard cold facts are, we have some Americans that are not far removed from being a terrorist, or threat to society. that factor can never be totally corrected, but it is within our power to eliminate a lot of the threat of terrorist activity by removing those most likely, illegal, or legal aliens. Taking away the sale of privately owned guns at guns show will stop nothing, the terrorist can still pickup a newspaper in most any state and find guns for sale from an individual with no background check.