Guests: Richard Morin Staff writer and director of Polling at the Washington Post Andrew Kohut Director for the Pew Research Center for the People and the Press Justin Lewis Professor of Communications at University of Massachusetts at Amherst Author, Constructing Public Opinion: How elites do what they like and why we seem to go along with it. (Columbia University Press, forthcoming) During the presidential election season, new polls revealing voter's leanings and attitudes appear almost daily— and approval ratings can move 10 or 12 points within days. Is the public really that fickle, or are the polls unreliable? Are polls really useful for gauging public sentiment? Join Juan Williams for a close look at how pollsters get their numbers.