National Farmers Union President Roger Johnson is retiring after a lifetime of farming and advocating for agriculture. Johnson says trade wars, climate change and corporate consolidation have made times tough for U.S. farmers and ranchers. But Johnson sees promise with a growing number of people who are returning to farming’s roots with smaller family run operations aimed at consumers “who want to know where their food is coming from.” The 66-year-old has led the Washington, D.C- based farm group since 2009. He’s stepping down when his current term ends next year. Before leading the group, Johnson was North Dakota’s agriculture commissioner.