He pledged to "walk the line" with workers whose "rights" were threatened, as they have been (and rightly so!) in Wisconsin. And after that glowing pledge, what did the unions get in the great recall of 2012? A tepid tweet -- about as close as the leader of the Democatic Party could get to voting "present."
Anyt other constituency Obama courts this year should consider this episode a warning. As for the unions, well, that was then . . . this is now.