Left-wing secularists who oppose religion in the public square may be dismayed to learn that their values apparently conflict with those of Democratic presidential candidate Sen. Hillary Clinton (N.Y.), according to the author of a new book on the former first lady's religious beliefs.

Although many Democrats support a very strict separation of church and state, the front-runner for the party's presidential nomination does not, Paul Kengor, author of "God and Hillary Clinton," said in an interview. In fact, Clinton is not reticent about injecting her faith into policy discussions, said Kengor, who teaches political science at Grove City College in Pennsylvania.