Tesla CEO and the world's richest man, Elon Musk, is slated to speak ahead of President-elect Donald Trump at his pre-inaugural rally in Washington, D.C., on Sunday. Musk spent over $250 million on last year’s campaign and was tapped by Trump to co-chair the Department of Government Efficiency. Other speakers include UFC CEO Dana White, Megyn Kelly, retired wrestler Hulk Hogan, and top Trump aide Stephen Miller. Performers will include Kid Rock, Billy Ray Cyrus, and The Village People.