Why Trump is not a running mate, Biden says: A new book

Biden says that Trump is running on a "fiery, unshakeable conservative agenda" that is "unapologetically conservative."The former vice president says he wants Trump to focus on "a radical change in our immigration system."But Biden says Trump is unlikely to offer any specifics.He says, "I don't think he has much to offer on immigration in a way that will appeal to conservatives."Biden says he woul...