Trump is shaming the Chinese AHEAD OF TIME if Xi sends in troops to massacre Hong Kong Protesters.
As for the Tariff war, never in the history of human kind, or animal kingdom for that matter, there ever have been 2 winners in ANY WAR. One side must lose for other side to win.
If Xi massacres Hong Kong protesters I'm pretty sure that would put our trade negotiations on hold and pretty much withdraw our extended hand. We cannot control their intentions via a single congratulatory tweet.
You know psychology quite well !
Leni