Ding! We have a winner.

Yes, exactly. Hate and love are very closely related, and both link up with sexual energies in ways that our society understands very poorly. Thus the tens of millions of Americans who hate him are feeding him with energy. It's not just that he lives rent free in their heads; he has another residence inside their panties, and gets to lap up the oceans of free energy they pour out on him. No wonder he grins so much.