President Trump’s Twitter account was in overdrive this morning as he lashed out at China in a series of tweets, including a note that U.S. companies are “hereby ordered” to find alternatives to that country. This could be part of a bizarre negotiating strategy, a knee-jerk reaction, or a sign of the end times. Feel free to choose whichever scenario you think the most likely because all seem equally probable at this point. The catalyst for the tweetstorm (which seems hilariously harmless when put in those words) was China’s announcement that it will place 5 and 10 percent tariffs on an additional $75 billion of U.S. imports. Notably for agriculture, it will apply an extra 5 percent tariff on imports of U.S. corn, so...