There is a massive amount of US wealth landlocked in China, there's no way a US president is going to risk having China appropriate all that wealth a la Castro. If you really believe Trump will go through with his childish bravado then I feel sorry for you and for all his voters but I get why it has made him popular. When it comes to China it's too late to do anything too drastic to reverse this situation and given the risks involved there probably isn't much will to rock the boat either.