Jesus Christ, the God of Abraham, Isaac and Jacob. It was Jesus Christ whom Moses met on the Mountain, with whom He spoke face to face as a man speaks with a friend (Exodus 33:11). No man has seen the Father — it was Jesus Christ who spoke with the Patriarchs and Moses. Jesus Christ IS God.
To the extent that earthly governments do not recognize Jesus Christ as sovereign, to that extent they are illegitimate. Jesus Christ IS God.