[+/-] Bush fan

There's a teacher in a small Texas town. She asks her class how many of them are Bush fans. Not really knowing what a Bush fan is, but wanting to be liked by the teacher, all the kids raise their hands except one boy -- Johnny. The teacher asks Johnny why he has decided to be different.

Johnny says, "I'm not a Bush fan."
The teacher says, "Why aren't you a Bush fan?"
Johnny says, "I'm a John F. Kerry fan."
The teacher asks why he's a Kerry fan.
The boy says, "Well, my mom's a Kerry fan, and my Dad's a Kerry fan, so I'm a Kerry fan!"

The teacher is kind of angry, because this is Texas, so she says, "What if your Mom was a moron, and your dad was an idiot, what would that make you?"

Johnny says, "That would make me a Bush fan."

Thanks to Maria for the joke.