One Sided Equation Canada and Mexico are America’s largest trading partners. U.S. exports of row crop commodities have benefited from the USMCA, as highlighted by Mexico’s retraction of its proposal to ban GMO corn, and main line U.S. agricultural groups lined up last week at the USITC to recommend a 16-year extension of the trade pact. But to the Trumpian ear, these groups only saw one side of the equation, U.S. exports. These groups understandably want their good times to continue to roll but they fail to address the elephant in the room.  The U.S. trade deficit with Canada and Mexico worsened under USMCA. It worsened even more in agriculture. It can be, and it is argued that trade deficits do not matter. But that does no...