This week on "Moyers & Company," Bill talks with Vermont Senator Bernie Sanders, who's been an independent in Congress for 21 years -- longer than anyone in American history. In 2010, Sanders made national news when he delivered an eight-and-a-half-hour speech attacking the agreement President Obama and the Republicans had made to extend the Bush tax cuts for the rich.

Bill also talks to Green Party presidential and vice presidential candidates Jill Stein and Cheri Honkala about what they've learned about American politics. Stein graduated from Harvard Medical School to become an internist specializing in environmental health. She was a Massachusetts gubernatorial candidate in 2002, co-founded the Massachusetts Coalition for Healthy Communities in 2003, and represented the Green-Rainbow Party in state races in 2004 and 2006. Honkala is an anti-poverty activist and community organizer who co-founded the Kensington Welfare Rights Union and the Poor People's Economic Human Rights Campaign. A formerly homeless single mother, Honkala became the first woman ever to run for Sheriff of Philadelphia in 2011.