ambassador cui tiankai on what it all means for the rival powers and for the nuclear neighbor north korea. >>> plus, is it back slash brewing against the me too moment? a historian and journalist who follow this culture shift. they join me to discuss. ♪ >>> "amanpour on pbs" was made possible by the generous support of rosalind p. walter. >>> good evening, everyone, and welcome to the program. i'm christiane amanpour in london with the world view. president donald trump is ending the year on a high, winning a legislative victory with his pledge to make massive tax cuts, and watching the stock market soar to record highs itself. but the year also ends with great disruption to america's relations around the world that could turn around and bite american workers where it really hurts. a potential trade war with china is looming as trump follows through on another campaign promise to paint that country as an economic threat that challenges america. ambassador cui tiankai is beijing's envoy to the united states, and he joins me now from washington. ambassador, welcome to the program. >> thank