The reason for that amount of the debt is the "bailout" which was put in place by the Bush administration in his last days and supported by BOTH Obama and McCain if either became president. The debt wouldn't be any different if McCain was in office as he supported this as well. The more important question is why was there a bailout, why was this sort of policy needed and what and who is responsible for getting the economy to that point?

I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.

-Max Payne