If you haven't read it, let me tell you that the words immigrant, immigration, and Hispanic don't appear in the piece at all. The only hint you might find of the demographic change in America that's caused the decline is the fact that unions were most powerful "at midcentury."
That would be before the Immigration Act of 1965, wouldn't it? Yes it would.
Meanwhile, over at La Raza News, the disaffiliation is all about immigration.
While we at VDARE.com accuse the AFL-CIO of being soft on illegals, they seem to feel that it's soft on Americans, and are miffed that Big Labor isn't fighting against such immigration enforcement as is actually taking place.