From where do Jehovah's Witnesses derive the doctrine that Jesus was and now is Michael the Archangel?

According to some Watchtower literature, it is taught that Michael the Archangel is Jesus and that Jesus, after He ascended into heaven, resumed the name of Michael. > "**It proves Michael the archangel is no other than the only begotten > son of God, now Jesus Christ.** The very name Michael means who is like > God and indicates Jehovah God is without like or equal." (New Heavens > and New Earth pg.30-31). > > **Jesus is actually the incarnation of Michael the Arch angel and > resumed the name when he ascended into heaven (** ibid. pg.30 Your will > be done on earth pg.316 ) Do Jehovah's Witnesses still believe this, and, if so, what is the biblical basis from which these teachings are derived?