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Have Republicans become political 'insurgents'?

Thomas Mann of the Brookings Institution and Norman Ornstein of the American Enterprise Institute make their first appearance on a Sunday news program since the release of their controversial new book, "It's Even Worse Than It Looks: How the American Constitutional System Collided with the New Politics of Extremism." Mann and Ornstein talk with Up host Chris Hayes and panelists Michelle Bernard, of the Bernard Center, and MSNBC political analyst Michael Steele talk about what they say is the extreme rightward drift of the Republican Party.