U.S. trade policy has been a constant companion for grain and soy markets virtually every day since President Trump was inaugurated in January 2017. One of his first moves was to pull the U.S out of the pending Trans-Pacific Trade Partnership (TTP) agreement among Pacific Rim countries. He then demanded that NAFTA be renegotiated under threat that the U.S. would otherwise withdraw from it. He slapped tariffs on steel and aluminum imports under the guise of national security, including some from long-time trading partners and allies. Chinese trading practices and the large U.S. trade deficit with that country have been favorite Trump targets since early in his campaign. He initiated a trade dispute with China by putting tariffs on imports f...