U.S. Sen. Peter Welch, D-Vt., speaks with volunteer Susan Prager at Helping Overcome Poverty’s Effects in Middlebury. Photo by Theo Wells-Spackman/VTDigger Theo Wells-Spackman is a Report for America corps member who reports for VTDigger. MIDDLEBURY — In a visit to Addison County’s largest food shelf Wednesday, U.S. Sen. Peter Welch, D-Vt., emphasized the importance of what he called a “battle” over food assistance in Washington, D.C. “Tradition…