The Dori Monson Show on 710 KIRO posed the following question: Why is it that every car in the Puget Sound region with more than two bumper stickers belongs to a Democrat? (Dori later refined "every" to "98%")
He devoted two segments for Democrats to call in and explain this phenomenon, and then one segment for conservatives or Republicans to call in and offer their theories. I called in during the "Republican" segment and offered my thoughts. It's a bit of a hassle, but you can download the podcast to hear my "theory":
http://sea.bonnint.net/0828dorihour2.mp3
This topic starts around the 10 minute mark, and my call occurs about 35 minutes into the recording (I was the penultimate caller). It's helpful to know about the "Larry Craig bathroom stall foot tap" story.