In fact, the US Aircraft fleet is a huge sitting duck, just waiting to be sunk. It can project power, sure - but only as a policing tool. In time of total war, the carrier is useless - every potential American adversary has the ability to sink these carriers with cheap, fast weapons designed for the job. There is no defence currently in the field - the laser weapons (only possible defense against supersonic smart ballistic nukes) currently being tested won't make it in wide deployment for another 10 years.
The moment open warfare is declared, America will loose its aircraft carriers, and trillions of dollars, thousands of lives. The only use for the Carrier fleet right now is for America to project its police force around the world.