If the businesses that sells the most coins to the public decide to fork, miners will follow. There is no doubt about that.
I don't see any Chinese following this - so no - total US attempt at a takeover that will lose (you seem to have not understood that the most BTC is being traded in China not the US).
Miners will go where the big bucks are. Plain and simple. Or put it simpler, hash rate will go where the big bucks are, irrespective of the actual Chinese miners.