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Trump is, saying dialogue is necessary. though stressing it must happen under the right conditions. today president trump slapped sanctions on a chinese tie tow zmouk on two north koreans. at the same time, they announced an arms sale to taiwan. taiwan actually thinks it is china. youre an asia expert, author of nuclear showdown. he joins me now from seoul, south korea. put this all into perspective for me. what does this mean? >> this is being president trump changed his china policy. because y...