Whether organized labor in the United States is sounding a terminal death rattle or showing signs of a resurgence depends on one’s perspective.On the one hand, union membership continues to suffer a long-term decline, especially in the private sector — it’s down to less than 11% overall from its peak of nearly 35% in the late 1950s.On the other, organized labor has notched some notable victories in recent years, including the fight for $15, which prompted [...]