David Blight, author of 'Frederick Douglass: Prophet of Freedom', tells you how Douglass became a demanding voice for America to live up to its ideals.

Eric Holder: ‘We have to take on this president. We have to take on this Republican Party.’

Opinion writer Jonathan Capehart talks with newsmakers who challenge your ideas on politics, and explore how race, religion, age, gender and cultural identity are redrawing the lines that both divide and unite America. "Capehart" is a podcast from Washington Post Opinions, with conversations adapted from Washington Post Live events.