No need for a Saturday Night Live sketch; the man parodies himself:

When telling the story of how his granddaughters had a slumber party with Barack Obama’s daughters during the week of the Democratic National Convention, Biden equated it to what he says Americans want.
“I believe that’s a metaphor, a metaphor for what the country is looking for. They’re looking for a sleepover with people they like!”

Must… avoid… joke… about… sleeping over with Sarah Palin…