WASHINGTON, DC – A key, bipartisan group of four senators today requested a 30-day extension of the public comment period for the 2015 Dietary Guidelines Advisory Committee’s (DGAC) Scientific Report. Chairmen Pat Roberts, R-Kan., and Lamar Alexander, R-Tenn., joined Ranking Members Debbie Stabenow, D-Mich., and Patty Murray, D-Wash.,...