inhospitable to autocracy. rather than autocracy, the united states appears headed toward endemic regime instability. joining us now are stephen levitskiy and daniel ziplock, both professors of government at harvard university. professor levitskiy, let me begin with you, and the point you make about how the american system is resistant to autocracy. we've heard about the cracks in the democracy, but talk about why it is difficult to establish autocracy in the united states. >> well i don't think it's the reason many people often think about it. i don't think it's our culture, i don't think it's our constitution or history. i think it's primarily the strength of a parade opposition or the strength of small