PowerLine muses that PDS is a reaction to Sarah's upbeat personality, which is a distinct contrast to Pelosi, Doyle, and other professional miserabili of the Democrat firmament. How can anyone be so happy, so positive, in these times of doom? Ululation is demanded!
Not hard. They'll be out of power in about a year.
Another possible reason: Palin's comments on Paul Ryan.
PALIN: we have some strong -- some young Turks in this party. Paul Ryan -- I'm very impressed with Paul Ryan.
WALLACE: Congressman from Wisconsin.PALIN: Yeah. He's good. Man, he is sharp. He is smart, articulate. And he is passionate about these commonsense solutions that America has got to adopt to get us on the right road.