Do you really think the Lefties have thought that far ahead?
I don't think they even have a notion about what's going to happen when all the deficit spending ducks come home to roost. There will be inflation aplenty for everyone and, worse yet, the Dems may be asked to explain where all the "stimulus", "TARP", "Quantitative Easing", normal Congressional deficits, etc. money went.
And who knows? By then, maybe the non-Lefties will have organized an opposition with a charismatic leader capable of, and eager to, (a) writing and articulating conservative economic principles, and (b) laying siege on the Dem's for their damage to the economy with techniques that have failed in each of the other 58 times in world history they have been tried.