Duh

When Sarah Palin appeared in SNL, she said she wasn't going to do the rap they asked her to do, so Amy Poehler did it.

In a recent interview, Lorne Michaels explained there was no plan for Palin ever to do the rap. I wasn't aware anyone thought for a second there was. It's not the sort of thing a candidate does, and it's also the sort of thing only a professional could pull off with a short rehearsal period.