China has now surpassed Canada as America's top trading partner. However America's two-way trade with Canada is roughly equal in imports and exports. China however exports four times more to America than it imports from that nation. So Trump is right to point out the disparity, and indicate he wants to do something about it. On the other hand, if he thinks he's going to twist China's arm by using Taiwan as leverage, he risks doing direct damage to the American economy while achieving nothing more than politically infuriating the people on the other side of the table. It's a losing tactic.