Marion Nestle, the doyenne of food, food politics, and food policy, has a number of post analyzing the new dietary guidelines, including this one and this one. She is da bomb.

From a recent Marion Nestle post: 

It is not an accident that five dollars at McDonald’s will buy you five hamburgers or only one salad. It is not an accident that the indexed price of fruits and vegetables has increased by 40% since the early 1980s, whereas the indexed price of sodas has decreased by 30%. Right now, agricultural policies support our present industrialized food system and strongly discourage innovation and consumption of relatively unprocessed foods.

At the Huffington Post, Kerry Trueman, co-founder of eatingliberally,org, asks Marion Nestle about why the food wars have become a red state/blue state issue.