The President's special commission on opioid abuse has recommended he declare a national emergency. Tuesday, he sent word he would not. But, the number of overdose deaths in a year exceeds troop casualties in the entire Vietnam War. Yesterday, he said "yes," after all. A national emergency could mean federal resources for treatment — including for mental illness. It's a long way from Nancy Reagan's "Just Say, No," but she was talking about crack cocaine in the inner cities, while opioids are a scourge of white Americans in Republican enclaves.