Redundant

Main Entry: re·dun·dant

Pronunciation: \ri-ˈdən-dən(t)\

Function: adjective

not the fact that you have TWO Obama stickers on your Prius so much as the fact that you felt the need to put an Obama sticker on your Prius at all

Seriously, it's assumed. If you drive a Prius and you're voting for McCain, THAT's worthy of a sticker!