The problem is the US doesn't have a long-range anti-ship missile - and the countries it considers potential enemies do. Boeing's Harpoon is subsonic and can fly about 60nm from a surface launch. Russia's 3M-54E Klub (SS-N-27 Sizzler) can reach out as far as 160nm[...]
I dunno about that range. Even if we're fighting the Gray Goo Armada of Tiny Dancer, the itsy-bitsy Water Witch of Puddles and Teardrops, I'd think a missile would need to fly a lot farther than that to be useful.