US Senator and presidential candidate Bernie Sanders is nothing if not consistent. From college days in Chicago to Capitol Hill to this year's campaign, he's pursued a single goal: "to fight for a progressive economic agenda that creates jobs, raises wages, protects the environment and provides health care for all" and "to take on the enormous economic and political power of the billionaire class."
Despite his Socialist leanings, Sanders has worked with Republicans in the Senate. As Mayor of Burlington, Vermont he was praised for fiscal efficiency. Biographers, old friends and former staffers say he's out to change the way Americans are thinking. We hear how a very private man has made himself one of this year's most important public figures.