Schools tend to reflect their communities. It is no big surprise that schools in L.A. & N.Y.C. are full of liberals - so are those cities.
On the other hand, in the faculty parking lot where I teach, the most prominent bumper stickers are of the "Support our troops" and "Bush-Cheney 04" types, because that's the type of community we are.
You have Bush bumper stickers galore? and Support our Troops?? I am SO jealous.