FILE - In this July 30, 2012, file photo, a farm hand stands by the harvested potato crop at King's Hill Farm at Mineral Point, Wis. Nutritionists say Americans don't need more white potatoes. But Congress has repeatedly disagreed. Language accompanying a massive spending bill unveiled by Congress on Jan. 13 encourages the secretary of Agriculture to allow low-income pregnant and nursing mothers to buy white potatoes for themselves and their babies with government vouchers. The move comes a little more than two years after Congress thwarted an Obama administration effort to limit the amount of french fries in school lunches. (AP Photo/Sitthixay Ditthavong, File)