Final answer:
The presidential doctrine that emphasized the right of the United States to take unilateral action against enemies is the Bush Doctrine.
Step-by-step explanation:
The presidential doctrine that emphasized the right of the United States to take unilateral action against enemies is the Bush Doctrine. The Bush doctrine was a foreign policy approach introduced by President George W. Bush after the September 11 attacks. It outlined the belief that the United States had the right to preemptively attack countries that posed a threat to its national security, even without direct provocation.