Lately Obama has been referring to himself as "progressive". Hillary also does.
If a progressive is someone who believes in "reform", then that term also applies to me ... the difference is in what reforms one believes are needed

Gay people want reforms. Tea Party advocates want reforms. Illegal immigrants want reforms. The reforms each group wants may be quite different.
I'd been hearing the term "progressive" tossed around, and really wanted to get a handle on what it was supposed to mean ... since its meaning seemed "vague" to me. Indeed, it IS vague.
My sense is that the word "progressive" is being used as a substitute for "liberal" or "left" since those two terms have acquired a negative connotation for those who do not adhere to the basic theory of redistribution of wealth. To quote Obama, "You can put lipstick on a pig, but it's still a pig."