For some time now, the left has been whipping up a boycott campaign against its favorite bogeymen, David and Charles Koch, billionaire owners of Georgia Pacific. As the lefties see it, the Koch brothers fund conservative organizations and politicians, like the Tea Party — which means, according to Common Cause, that they are “moving democracy into the control of more wealthy corporate hands.” (Common Cause, it should be noted, is itself heavily funded by corporate types, including the Kochs’ left-wing counterpart, George Soros.) But now, a top official of the United Steelworkers union, International Vice President Jon Geenen, has discovered...