his tweet to china, say he they have not done enough. 0% of the foreign aid and foreign trade comes from china. how can they do more? turn off the lights? deal with the oil? they don't want refugees on their border. >> they don't want a collapse of north korea into china. but they don't want to see us carry out a military operation which triggers a war right next to them. because they control so much of the food and fuel that goes to north korea. what they could do is quietly make it clear to the north koreans that they, too, have run out of patience, and the north korean threat to collapse into their arms is one that no longer applies. it may well be this is the sort of thing secretary of state tillerson could be saying to the chinese. one of the things he could communicate is we are prepared to work with you on this and prepared to look for diplomatic approaches.