Like any president, Donald Trump likes to brag about low, low unemployment rates. Who can blame him? Even his least-favorite paper—what Trump habitually calls "the failing New York Times"—says it literally "Ran Out of Words to Describe How Good the Jobs Numbers Are." In May national unemployment stood at just 3.8 percent, the lowest figure in more than a decade. That tight labor market makes it particularly unnerving to read this AP story from Sandusky, a resort town in the northeast corner of Ohio: More than 100 workers at an Ohio gardening and landscaping company were arrested Tuesday when...