The Rev. Jeremiah Wright is long gone; Rick Warren, just an Inauguration Day memory. The hordes of ministers around town who were hoping they'd somehow wind up with the first family in their pews have (mostly) given up. The president has been pastorless for quite a while now. Well, sort of. Seventy miles from Washington's prying eyes, Barack Obama has been attending church from time to time at Camp David, where services are led by a 39-year-old Navy chaplain with a famous last name, a compelling life story and a fervent belief in a God who works miracles. Carey Cash,...