MORGAN, Minn. — U.S. Rep. Michelle Fischbach and Erik Osberg, the DFL-endorsed candidate seeking the Minnesota 7th District seat she now holds, both agreed that farmers need stability. But they spent the next hour of a candidate forum Tuesday disagreeing about what is standing in the way. Fischbach, a Republican from Regal, and Osberg, of Wadena, shared starkly different views on tariffs, trade and USDA reorganization as they shared the stage wi…