Major US agriculture states including Minnesota, Iowa and Illinois are bracing for one of the wettest planting seasons in more than a hundred years. For Lake Benton, a small town of 683 people in southern Minnesota, the stress is compounded by a plunge in prices and an escalating US-China trade war that has grounded the soybean trade to a virtual halt. The double blow of flooding and tariffs has hit farmers like Jon and Bob Worth, but they say they are willing to endure the short-term pain to…