What's the Deal with Ann Coulter and John Edwards?

As I am sure you are aware, the latest skirmish between Ann Coulter and John Edwards was launched this week. It started with Coulter's lovely comment that, "If I'm gonna say anything about John Edwards in the future, I'll just wish he had been killed in a terrorist assassination plot." This led to her confrontation with Elizabeth Edwards where she simply kept stammering that Mrs. Edwards wanted to silence her. This comes on the heels of her calling former Senator Edwards a "faggot" earlier this year and her earlier making insulting comments about the Senator's supposed political use of the death of his son (which, for the most part, seems not to be grounded in any fact).

I recognize that virtually no one takes Coulter seriously. Indeed, she makes Rush Limbaugh sound like Kant, but I am mystified about her obsession with John Edwards. I have, however, developed a few theories:

1. She is secretly in love with Edwards, but like a pre-teen, she only can show her love by insulting him.
2. She believes that he is the Democrats weakest candidate and is using these tactics to help him get the nomination.
3. Conversely, she is secretly working with Edwards, as they both recognize that these idiotic attacks gave both of them attention (all that she cares about) and help him raise money.
4. She is even dumber than I imagine.

Any guesses? Other theories?