The president commented about the Uvalde massacre, condemned the National Rifle Association, and once again called for gun control. Nothing demanded by either him or other Democrats, however, is likely to have prevented the school shooting.The shooter was a United States citizen. He was not a felon. He bought the two guns legally. He passed a background check. He never made open, unambiguous threats on his Internet page. When he made allusions to possible violence he did so using Instagram so there wouldn’t be a permanent public record. Even then he didn’t go beyond saying the other person should wait ...