What do many believe to be the U. S.'s biggest foreign policy failure in recent years? A: The American foreign policy has failed in the past to use diplomacy and negotiation to further its goals.

B: The lack of military assistance to those who are fighting Islamic extremists has been a major political failure.

C: Many believe that the U. S. has not given enough financial aid to the countries of Africa.

D: Abandoning those living under brutal regimes and denied human rights is seen as a past foreign policy flaw.