I believe the biggest threat to America are the domestic enemies. They are the ones undermining the business and manufacturing environment to make it less competitive and for manufacturing jobs to move overseas. They are the ones, for example, purposefully changing the demographics of the country, etc.
The founder's goal was to create a country so strong no foreign power would be able to undermine it but only through domestic corruption. Mind you, America was quickly dragged in to so many wars since its founding
China acts in a certain way that maybe natural to the interest of its nation, corporate and IP espionage, Taiwan, Tibet, etc. The communism is a plague on the human nature and its natural need to live free. Unfortunately America helped the communist revolution by withholding military aid. There are always shady stuff happening with globalist scum recreating the world in an unnatural image.
My point is not to get side tracked. Yes Trump should do what he thing is best for US economically. Like the founders called it, trade with everyone but don't get entangled in foreign policy. When I hear china being brought up I remember quote from Orwell's 1984:
“The past was alterable. The past never had been altered. Oceania was at war with Eastasia. Oceania had always been at war with Eastasia.”