The response would be overwhelming.
Why No Enemy Would Dare Sink a U.S. Navy Aircraft Carrier
Circumstances obviously matter for an attack on a U.S. aircraft carrier. An out-of-the-blue attack from a conventionally armed state actor would enjoy the highest levels of success, but would also have an impact on elite and public opinion in the United States that might drive calls for dire retribution.
Since the 1950s, the supercarrier has been the most visible representation of U.S. military power and maritime hegemony. Although supercarriers have participated in nearly every military conflict since the commissioning of USS Forrestal in 1955, no carrier has come under determined attack from a capable opponent. In part, this is because supercarriers are very difficult to attack, but the symbolic grandeur of the massive ships also plays a role; no one wants to know what the United States might do if one of its carriers came under attack.
(This first appeared several months ago.)
What would happen if a foe attacked a United States Navy (USN) aircraft carrier during a conflict? How would the United States react, and how would it respond?