Thanks for highlighting this excellent speech. Rich Trumka is indeed a former coal miner. My recollection from the late 1970s is that Trumka is a lawyer as well.
The story I heard then was that he'd recently taken his shiny new law degree and gone down in the mines, intending one day to head the union. Coming a family in which, two generations back, education had been the men's sole way to avoid mining, I wished him well.
I still do.