A glass sat in front of Sen. Roger Marshall in a Senate hearing on food policy. On the outside, an etching of the K-State mascot. On the inside, whole milk. “Let me clear my voice here for a second with a glass of whole milk,” Marshall said, before taking a sip. “The greatest drink known to mankind, known to humankind.” It wasn’t the first time that the Kansas Republican performatively drank milk in a meeting of the Senate Committee on Agriculture, Nutrition and Forestry. He did the same in a December subcommittee meeting, though that time from a small red carton. Marshall’s milk consumption in committee coincides with Congress’ efforts to approve the latest version of the farm bill. Every five years, Congress passes sweeping agricultural legislation that deals with everything from school nutrition programs, to commodity prices for major crops to eligibility for food stamps. In 2010, Congress passed a bill amending the School Lunch Program to set new health guidelines. According...