A Universal-Background-Check Law Would Not Violate the Second Amendment

The terrible shootings in Gilroy, El Paso, and Dayton in the past week have renewed cries for Washington, D.C., to do something. In our federal system, the most effective responses will have to come from state and local governments, which have the primary responsibility and the broadest tools for reducing violent crime. But the president and Congress can act in one area, the rules for buying guns.