The 2010 Census shows an interesting population trend
(emphasis in original):
In short, 12 House seats (and electoral votes) went from states with an average government union share of 47 percent to states with an average government union share of 24 percent.
It's much too simplistic to label this cause-and-effect. But the numbers describe the "effect" part of the equation clearly. People are not only moving from strong union states to weak union states, but from strong government union states to weak ones.
With both short- and long-term trends against them, organized labor really has but one weapon remaining: huge wads of cash. That might be enough to stave off disaster.
Looks like the big-union states need a border fence.