The daytime talkshow star has always been a driver of cultural trends. But now as Dr. Oz campaigns for the Senate, we look at her politics, and how she wields her political influence.

On Today's Show:Kellie Jackson, historian, associate professor of African Studies, Wellesley College and host and executive producer of the Oprahdemics podcast, and Leah Wright Rigueur, associate professor of history, Johns Hopkins University and co-host of the Oprahdemics podcast, talk about Oprah's role in giving Dr. Oz a platform, what he became and if she has any responsibility to speak out.