The Dems cannot provide from a bare cupboard. Even the brainless Dem electorate will start to understand the Dem's failure when socialist handouts won't be enough to buy a Happy Meal.
However, when the change comes, look out! The conflicts in the streets won't be between the Left and Right. It will be between the Self-Sufficients and the Dependents. When the government can't support the Dependents, they will decide that they have the right to take what they need from those who have prepared for the coming disaster. There could be a breakdown of societal norms on every level. Make sure your guns are locked and loaded.
I would expect the latter (societal breakdown) long before I would expect conservatives to take back the majority. The GOP is dead.