Clinton — toting a copy of Milica Z. Bookman’s new book about economics in the afterlife, “Do They Take Credit Cards in Heaven?” — spoke of recruiting presentations he’d attended at the local Mormon church while he was growing up in Hot Springs, Ark. Clinton, a Baptist, said he admires the church for its high ethical standards and belief in a celestial kingdom but said the idea of being in a heaven without his non-Mormon friends was too much to give up. “I didn’t want to leave all these other people behind,” he said.