So, if you're not just rattling off the propaganda...
How come everything you say about the modern union movement comes right out of the brochure? ;)
A primary function of the modern labor union is to funnel money and votes to the Democratic Party. I thought the political donation documentation I linked to would make that obvious, but I guess not. The history of this relationship is irrelevant. It's what's going on right now.
Depending on the union, anywhere from 20 to 40 percent of dues-paying union members are registered Republicans. Support, financial and otherwise, by union leadership for Republicans is essentially zero. Attempts to do anything to alter this disenfranchisement have been furiously opposed by both union leaders and Democrats.