Campaign bumper stickers are part of a hallowed (if sometimes raucous) tradition, as Martha Teichner now tells us: It’s been said that Americans consider their cars extensions of their personalities, ...

A STICKY HISTORY: Consider the bumper sticker, that easy-to-apply accessory that gives others a glimpse into the vehicle owner's personality, tastes, hobbies, political affiliation or sense of humor.

MAUREEN CAVANAUGH (Host): I'm Maureen Cavanaugh. You're listening to These Days on KPBS. Every once in a while, if you sort through the nonsense, the inappropriate comments and whose child was an ...