"The appointment of Jesus to be the Savior of the world was contested by one of the other sons of God. He was called Lucifer, son of the morning. Haughty, ambitious, and covetous of power and glory, this spirit-brother of Jesus desperately tried to become the Savior of mankind" (The Gospel Through The Ages. p. 15. Milton R. Hunter - First Counsel of the Seventy). This clearly shows that Mormons believe Lucifer is Jesus' spirit-brother..
echhoooooo. :-) Good point but want to make sure people know where to see what the official teachings of the Mormon church are. Some of the things I have seen on here on the Mormon church are way out in left field and that's an understatement.