Any country that has an independent foreign policy is automatically enemy of the U.S.
Any country that has a military the Pentagon don't like is enemy. 
Any country that buys oil in the open market not using the U.S. dollar is subject to sanctions, and even outright invasion. 
Any country that tried to protect its sea lanes of trade is enemy requiring war by the U.S. carrier battle groups. 
Any country that is more successful in a trade agreement with the U.S. is subject to cancellation, even economic war, even when all trade rules are complied with. Head if win, tail you lose. 
Any Muslim country is enemy, by coup or by the Pentagon. 

U.S. foreign policy: We rule, we run, we war, we hit, you're either with us or against us. It's America Only. God Bless America. Christian God that is. 

History confirms there is only one end for such an empire. Check the British Empire. Ended only after 2 world wars as it fought 2 upcoming empires that challenged it - Germany/Japan. 60 million dead.