Why should a nation that is capable of annihilating the world with it's nuclear arsenal be afraid of China? Why should it be afraid? Why should it fear for being put in the position it was 100 years ago? Remember that the US was not always a superpower. I don't think they'd make that much of a fuss about it when/if they lose that status. As long as the people over there stay happy. Sure the neocons will whine but they will adapt (or hopefully be gone). After all, the US nation is build up from humans, and humans adapt. They change and adapt. Just like Chinese, just like the rest of humanity.