Transatlantic DynamicThose in U.S. agricultural trade policy agree with Donald Trump that the EU treats America badly.  The large U.S. agricultural trade deficit with the EU has been growing at a compound annual growth rate of over 6 percent. Since WWII, the U.S. has subsidized Europe’s security and economy. Yet, Brussels has just completed a free trade agreement with agricultural competitor Mercosur, but not with the U.S. Why? In general, Europe’s opposition to a trade agreement with the U.S. can’t be about agriculture since Mercosur is an even lower cost competitor for the EU than American farmers. Instead, Europe is seeking to expand its economic alliances with somewhat weaker trading partners where it can better dominate, and...