What? The top of your head is supposed to be a linked reference?
Erie has long held a reputation as a blue-collar union town, but labor's clout here has dwindled over the last quarter century.
Many large, unionized manufacturers like GE Transportation Systems and International Paper have downsized. Other firms have relocated or gone out of business. The result, Bruno said, is that an estimated 15 percent of blue-collar workers in Erie carry union cards compared to 25 percent 20 years ago.
Labor leaders say renewed organization efforts in coming years may focus on the plastics industry, which accounts for 5,600 jobs in the Erie area. A total of 67 plastics companies operate locally. That number swells to 90 when plastics-related industries are included. Of those, only a handful employ union workers. (Source)
There. 15% for the Erie area. Just like I said. Pittsburgh and Philly are probably a little higher. Maybe Scranton/Wilkes-Barre, but unions in that area could also be as dead as the coal mines. But the center of the state? Sheesh, that's conservative as heck. Yeah, you'll find some unionized plants, but nowhere near as many as you claim.
Just like the rest of the nation, union growth has been in the government employees and public school teachers. Perhaps health care workers as well.
But your exagerated claim about manufacturing damages your credibility immensely.