What does characterize a failed State?
ABSENCE OF JUSTICE.
In the USA none of the criminals that they authorized torture was punished. None of the ones that lied to begin an illegal war were punished. None of the ones that diverted money during the occupation of Iraq were punished. In the USA the impunity is the rule.
INEXISTENCE OF PUBLIC SERVICES
In spite of being one of richest States, the USA it applies in the education and in the public health a small one percentile of what it destines for their Armed Forces. In the USA the poor have to enter in the Army to have medical aid and to do academical course.
DEMOCRACY JUST APPARENT
The Americans vote for for President, but the President of the USA doesn't command the American Armed Forces. Obama ordered to close the Guantanamo prison and he had to revoke the order because the same was not accomplished by the military ones (they refused to accept a valid order and they were not punished). The USA are governed by the Pentagon and the Presidency became an ornamental position.
FOREIGN POLICY BASED ON THE USE OF THE FORCE
In the international organisms the USA act as if it was not among same. The USA want to force other States accomplish the International Law, but they refuse to accomplish the same Law. The USA are an arbitrary empire disguised of republican State.
The USA are not a failed State. It is a State fucked because their inhabitants speak and they speak and they speak about a freedom, but they don't have power to govern his own country (because the country doesn't belong to them, it is of the American military ones).