Farmfest is typically a genial event -- a stop elected and aspiring officials consider an easy political must-do. But at this year's gathering in rural Redwood Falls, as First District U.S. Rep. Tim Walz, D-Minn., put in an appearance, an audience member declared loudly that plans for national health reform were a "step toward communism." Walz, a veteran, shot back: "I didn't spend 24 years in the military to be called a Communist, I can tell you that." A similarly harsh reception confronted Fifth District Rep. Keith Ellison, when he struggled for control of the microphone at what should have...