"I've assumed that the progressive label was something dreamed up by the media because the term "liberal" was being used too much. Do any of the members of Congress actually call themselves progressives, or is it a media term?"
Yes, members of the US Congress call themselves "progressive." I'm not the most educated or articulate person. I'm just a country girl from the coalfields in the foothills of the Appalachian Mountains in Virginia. My mother, God rest her soul, with a third grade education, was the wisest person I've ever met. Self educated to the point she could blow the socks off her college educated children at Scrabble. Blushingly, I say, by the grace of God, I've interviewed US Presidential candidates and a 93 year old volunteer with the Appalachian Regional Commission, ironically, living in poverty.
Help me enlighten myself.
Please allow me. Remember, this is
one organization I know about and quickly posted. I can give you more to consider if you'd like:
http://pdamerica.org/about/board.php
http://pdamerica.org/tools/pda/Adboard.pdf