Close the border and watch the revolution begin. The financial collapse would be epic. It would quickly turn into a narco-state and we'd be able to justify invasion and annexation. There's be plenty of Mexican pussy available well below market rates.
Close our markets to the Chinese and return business here? Agree only to send food in return for basic, common items easily produced elsewhere if they get belligerent? Revolution. They certainly aren't going to invade us. And , Chinese pussy galore.
Duterte closed the Phillipines, so we should tap into sources elsewhere for women who understand the value of the American dollar. Besides, once we show China some testicular fortitude, they'll invade the Phillipines, anyway.