First, why do almost all U.S. mass shootings occur in "gun-free zones"? Indeed, it's hard to name any that have not. The 2015 Charleston mass-murderer apparently targeted a church instead of a school partly because the school had security – but South Carolina banned guns in church. Would any of us put a sign in our yard saying, "This is a gun-free home"?

Second, can an evil person using a gun to murder be stopped by anyone other than a good person using a gun? In the December, 2019 Texas church shooting, the murderer was prevented from murdering many times more than his two victims by a good parishioner with a gun who shot him in six seconds. Many other mass murders have been similarly stopped.

Third, with all the many thousands of city, county, state, and federal gun control laws we've had for many decades, how realistic is it that any new ones will make a difference? Very few guns used in crime are ever legally bought since, by definition, criminals don't obey laws.