What is organic food? That question is at the heart of a fight between the U.S. Agriculture Department and organic farmers. New rules proposed by USDA leaves open the chance "organic" may include genetically modified food and items currently banned from carrying the label. A public comment period on the nation's first organic standard ends Thursday (April 30). Thousands have commented, a majority oppose a broad definition of "organic". Mainstreet Radio's Mark Steil reports. : Most of the nation's organic farmers agree some sort of national definition of organic is needed. Right now organic is whatever individual state or private agencies say it is and that varies a great deal. Far