Burning Political Question of the Day

Why can't we Nickelback Sarah Palin?

Seriously, why do pop bands seem to have a sell-by date, where they go from beloved to loathed (I was unaware of Nickelback until people started hating in them, because I am, well, square), but figures in the political media complex don't.   (See also, "Blowfish, Hootie and the")

I burn for the day that I can place the beast from Wasilla  on my list of They Who Must Not Be Named.