As you’ll see, O’Rourke has no answer to this perfectly predictable question except to mumble something about weapons of war. But why should we focus on weapons of war, asks Columbine survivor Evan Todd, when they’re responsible for only a fraction of all gun violence? The Columbine massacre itself wasn’t carried out with assault rifles, he notes. Ed sent me a spreadsheet in which he ran through the FBI’s most recent statistics for murder by firearms and found 10,982 in total in 2017, of which exactly 403 were committed with rifles — a rate of 3.67 percent. There were many...