The Trump administration’s trade war redux has landed in America’s heartland. Chinese buyers have halted purchases of several U.S. agricultural products, prompting a crisis for farmers as the harvest season for soybeans, a major export, approaches.  Every year since 2020 China has bought more U.S. soybeans than all other countries combined, adding up to $74 billion in purchases over that time, according to data from the U.S. Department of Agriculture. But this year the U.S. has not e