President Donald Trump argued last week that as a result of the federal enhancement of police work in Washington, D.C., the city has gone in four days from being the most dangerous in America to being the safest. He cited no evidence but relied apparently on his own observations and anecdotal references from friends. He opined that everyone wants him to keep their cities and towns safe.
Trump couldn’t resist taking credit for an increase in the number of arrests. These included such crimes as vagrancy, running away from federal agents, and striking the bulletproof vest of a. . .