NO, I think it's moronic NOT to pass FEDERAL REGULATIONS so we can at least try to control the flow of gun across guarded national borders while dealing with the out of control gun violence within our borders. It's the patchwork nature of our gun laws (the few that we have and actually enforce) in a country that has free and easy movement of people and things that is the problem. That said, I do not begrudge Chicago or NY trying to find SOMETHING to help, if not solve, their local problems in the face of so little help at the federal or state level.
Beyond that, we need more than JUST better gun laws. If we put half the funds into solving the problems that give rise to gun violence that the current level of such violence costs us, we might eventuality dig our way out and stop the flow of blood on our city's streets.