Yes, Jehovah's Witnesses believe that Jesus Christ was previously the archangel Michael. They believe Michael is the highest angel and that he became Jesus when he was born on Earth. After his death and resurrection, they believe he returned to heaven as the glorified spirit being, Michael the archangel.
Their belief is based on their interpretation of several Bible verses, including:
* 1 Thessalonians 4:16: "For the Lord himself will descend from heaven with a cry of command, with the voice of an archangel, and with the sound of the trumpet of God." They associate Jesus's descent with the voice of an archangel.
* Jude 9: "But when the archangel Michael contended with the devil and disputed about the body of Moses, he did not presume to pronounce a blasphemous judgment, but said, 'The Lord rebuke you!'" They see Michael's authority and role as similar to that of Jesus.
* Revelation 12:7: "Now war arose in heaven, Michael and his angels fighting against the dragon. And the dragon and his angels fought back." They interpret this as Michael leading the angelic forces, a role they believe Jesus would have fulfilled.
* Daniel 10:13, 21 and 12:1: Where Michael is described as "the great prince who stands up for your people".
It's important to note that this belief is specific to Jehovah's Witnesses and differs from the beliefs of mainstream Christianity, which generally views Jesus as God the Son, distinct from the archangel Michael.