I've never been sure…

…exactly what "progressive" means, but if it means this...

Progressives believe in openness, equal opportunity, and tolerance. Progressives assume we’re all in it together — we all benefit from public investments in schools and health care and infrastructure; and we all do better with strong safety nets, reasonable constraints on Wall Street and big business, and a truly progressive tax system. And progressives worry when the rich and privileged become so powerful they undermine democracy.

…then I suppose I am one, though "liberal," a tag some "progressives" eschew, seems to cover the same ground just fine.