Ultimately, I don't know ...
About all I can say for sure is that Barack Obama will continue to be a disaster for Americans and their closest allies being that he will continue to act against their best interests to appeal to well connected special interest groups or to appease countries that are certainly not allies to the United States. Unless the United States gets a congress and a president that are both dedicated to cutting the budget deficit, the United States will continue to run unsustainable deficits and will (eventually) hit a point where they have a sovergn debt crisis of their own or will encounter hyper-inflation.
Of the republican candidates there seems to be only a few which could realistically be elected, and of those it is difficult to believe that any of them are any more motivated to fix the underlying problems in the United States; and they seem like the typical corrupt politicians who say whatever it takes to get elected.