I suspect only two years. Then the House comes up for a vote again. I seem to remember 1994.
If Obama wins, we will need to fight a holding action until he screws things up so badly that the House shifts.
If Pelosi and Dingy's shared dream (veto-proof majorities in both chambers) come true, there will be no holding action. We'll be on the expressway to third world status.
Sorta, kinda like living under a dictator :)