Answer:
No, he is not. His theology and LDS theology differ in many areas. According to
LDS, people pre-exist in the spiritual realm before being born into the physical realm. LDS also believe in the possibility of being re-incarnated. There is a passage in the Bible refering to John the Baptist as Elijah by Jesus, and they claim this indicates he was the re-incarnation of Elijah. Sun Myung Moon teaches that John the Baptist had the same mission as Elijah and that Elijah was cooperating with him from the spiritual side...John the Baptist was Elijah in the sense of inheriting his mission. There are other theological differences.