How religious are Americans? How does our faith affect our everyday interactions with our friends, family, and neighbors? What is behind the uniquely American blend of religiosity and tolerance? And what are the political implications of the increasingly strong association of the Evangellical Christian movement with the right wing of the Republican party? Co-authors David Campbell and Robert Putnam seek to answer all those questions, and more, in American Grace: How Religion Divides and Unites Us. David Campbell, who is an Associate Professor of Political Science at Notre Dame, joins us today to talk about some of the surprising insights that American Grace offers into faith in America.