Despite the constitutional division of church and state, the impact of Catholics on American politics in the 1960s and 1970s has been remarkable--as the names of the Kennedys, Eugene McCarthy, Thomas "Tip" O'Neill, Peter Rodino, Thomas Eagleton, the Berrigan brothers, and Cesar Chavez will attest. In this portrait of American Catholicism, Mary Hanna intensely analyzes the political influence of this enormously complex organization. She focuses on...