In this episode of Greta Talk, Greta Van Susteren catches up with David Gregory about his new book, How's Your Faith. The book explores Gregory's own faith journey and features interviews with religious leaders like Joel Osteen and Cardinal Tim Dolan. We even learn which US president inspired the title of the book with one simple question.

The On the Record host and the former moderator of NBC's Meet the Press discuss the things that have inspired his faith, including his mother's battle with alcoholism when he was a teen. Gregory also opens up about the difficult moments following his departure from NBC, how his "mixed marriage" with protestant wife Beth challenges his faith, and what has helped him get on a path of humility.

Listen below and don't forget to check out David's new book How's Your Faith!