Time to tell David about what trade imbalances and unfair trade deals are all about.  For the last 8 years, the average US trade imbalance  is $500 billion plus with China, $55 billion plus with Japan, and $50 billion plus with Mexico and almost $1 trillion counting all imports.  China and other foreign companies restrict US imports and place large tariffs on them as well.  In addition, China and Japan manipulate their currency in violation of international financial rules.  In addition, China and Japan do dumping of steel, etc.. all subsidized by their governments.So Mr Trump is right when he says we (and Canada should too) should renegotiate the trade deals like NAFTA., etc... And if China won't simply remove them from a most favored nation list.