Because I would never want anyone to get all over my case for wearing an Obama shirt (Which I WOULD wear if he'd ever ship the damn thing to me thankyouverymuch), I think it is only fair to allow her to wear whatever shirt she wants to.

Kids can be affected by opinions though. I distinctly remember my fifth grade teacher telling me that a woman could never be president. I went home and asked my mom about it, thinking there were laws in place that didn't allow women to be president. My mom lost her mind. She tried so hard to get that teacher fired. That was many, many years ago - but I still remember it like it was yesterday.