So, talk-radio listeners are knuckle-dragging morons who are just too stupid to be liberals.
If this is such a well-known fact, you'd think somebody would have pointed this out to the folks who started Air America, a liberal talk-radio station, before they went on the air, nothing that it would mean they won't have any listeners.
It's interesting how "fact" was not heeded before they sunk millions into this venture, but is resurrected now as an obvious truth -- once "Air America" went bust.
Can you say, "sour grapes"?