In this first episode of In Conversation With, Mary Margaret Olohan sits down with former US Senator Rick Santorum to discuss the changing face of Catholicism in American public life. Santorum traces the shift from the social gospel Catholicism of the Democratic northeast to a more doctrinally confident faith that has increasingly found its home on the political right, pointing to the composition of the Supreme Court and the growing number of Catholic Republican governors as signs of a movement that may only be gathering pace.