Green Party presidential candidate Jill Stein is a physician and environmental-health advocate known to prepare her own organic meals on the campaign trail. Her party's platform calls for a transition to organic agriculture. When Stein was in the studio to record this weekend's show, we asked her to weigh in on the debate over a recent Stanford study which found that organic foods aren't any more nutritious than conventional foods. Food-fighting words to be sure. Here's her response.