President Donald Trump’s recent flurry of attempts to deploy National Guard troops in cities around the country reminds me of an old “block-that-metaphor” line from the New Yorker: “As I look at things with a broad brush, there are lots of things going south out there, and there’s no silver bullet.” With this particular president and his constant whirligig of threats, puffery and offhand remarks, one never knows whether he is announcing a genuine policy initiative or simply reveling in the furio