So, college graduates are flocking to our more progressive cities in search of not only high-paying skilled work, but also the cultural amenities, low crime rates, and better quality air. Of course, this means fewer college graduates for every place else, which means dumber congressional districts, which means a dumber Congress.
The lesson progressives should draw from this is that the labor movement is more important than ever for the political prospects of the left. The labor movement crosses the racial divide, but also the educational and skills divides, and is much broader geographically than our urban areas alone.
Whether you care about labor unions or not, you should see their importance to the progressive coalition. The weaker they get, the more isolated we become politically.