Elon Musk's super PAC awarded two $1 million prizes to registered voters in Michigan and Wisconsin on Thursday, defying warnings from the Justice Department that the prizes could be illegal. The pro-Trump super PAC said Wednesday that the Justice Department had sent a letter to the group warning that its "daily" sweepstakes might violate federal election law, which prohibits paying for voter registration. Musk, Tesla's chief executive and the world's richest man, launched the sweepstakes on Saturday, and the super PAC will announce a winner every day until Wednesday.