In a new ad, Rick Perry claims, “I’ll end Obama’s war on religion.” Mitt Romney is still facing concerns about his Mormonism among Evangelical Christians. And questions about Newt Gingrich’s faith pop up as part of his infidelity issues.

Brookings scholar and Washington Post columnist E.J. Dionne says that faith often becomes part of the presidential campaign process and that candidates should explain their faith in an honest way so voters can determine how religion will affect their decision making.