Actually there is no border issue to solve between Bhutan and China for we are whole one nation and that 'Chickens's neck' is useless for us for the land lower can be used by Indian at any moment they want.
Indian was once the outsider for Sikkim and you can say culturally you are the same and US and India in whatever situation are natural allies not only at that moment in 1962.We oriental is not strong enough now so we have no choice but to play games each other for outsiders.
What does it matter so called US return to Asia?
It is inferior PLA not other factor have made us to bear the reality that our own territory be in Indian control.
I also notice the abnormal thing that Chinese media and foreign ministry spokeswomen only to be bombastic on topics of maritime issues and keep low key in India-China border issue.But that doesn't mean we Chinese never notice the issue for you know 90,000 sq km Chinese territory now is under...