LOS ANGELES — Disaster is in the air. It clouds the skies, it sears the eyes, it lodges in the lungs. Most of all, it weighs on the heart. For those who have lost it all, the pain is acute.

To serve as an economic adviser to Trump, it helps to share his belief that tariffs make the U.S. richer. Not many economists meet that criterion.Stephen Miran has made just that case. Miran,