And will Democrtas fight for it?

With the exception of Alan Grayson, probably not. The only thing they'll focus on is the fact that Sink lost. Be prepared for a lot of Democratic candidates to run like hell from the ACA. They'll talk about " fixing EVERYTHING that's wrong with it. Translation: They'll be saying the everything IS wrong with it. Hell, I wouldn't be surprised at all if some go as far as promising to join the RepubliKochs to vote for repeal in the next session.