Scarlett Johansson has slammed reports she has a crush on US presidential candidate Barack Obama. The actress, who is engaged to actor Ryan Reynolds, has denied she supports the democratic hope because she falls for him. A rep for Scarlett says. "She is a surrogate [Obama campaigner]. They're not exchanging love letters. Everyone seems to be forgetting that she's engaged. "Kal Penn is also a surrogate, and no one says he has a crush on Obama."
