i've been explicit about this in the past: i think the democrats should call them on their bluff and encourage them to repeal. at some point, they're going to have to call obama out on this.
if i was a democratic representative, i would actually vote in favour of the repeal and immediately get to work in building support for single payer to replace it. if enough democrats stand up and call the republicans on their bluff, the republicans will be forced to retreat on it, because the whole point was to avoid single payer.