Stephen Cohen is an American scholar of Russian studies. For well over three decades he has been a professor of Russia and its relationship with the US, and authoring books such as "Rethinking the Soviet Experience: Politics and History since 1917," "Sovieticus: American and Soviet Realities" and "Bukharin and the Bolshevik Revolution." He is a CBS News consultant and member of the Council on Foreign Relations. Married to Katrina vanden Heuval, editor of "The Nation," were he is also a contributing editor, they have one daughter together.