I was reading a report published by the US Chamber of Commerce's research foundation the other day and came across this statement. I was surprised:

Also, the erosion of the union movement makes it is more difficult for those with blue collar jobs to rise to middle class.

Lest you think I made that up or took it totally out of context, here's a screenshot:

So, to summarize, the United States Chamber of Commerce is of the opinion, after extensive research, that the decline of unions has made social mobility more difficult for a significant group of people.

Or, as your Twitter feed can say (click to make it happen, you'll have the opportunity to edit it before it goes live):

The @USChamber argues that unions help people break out of poverty