You cannot keep borrowing as a government any more than with personal finances. The debt becomes unsustainable, foreigners won't buy it, tax revenues will not be able to cover it, raising taxes will not supply the needed funds and the US dollar will tank. Printing money will not solve it but will only destroy the currency.
And they will not be able to say its is Bush's fault so as to make anyone believe them
Britain and the USA are becoming shabby second world has beens as China and India emerge as solvent global players. Expect migration of talent and money (what's left of it) from the USA to these new players.