In so many words…

Giuliani: A noun, a verb and Nine-Eleven.

McCain: A noun, a verb and P.O.W.

Palin: A noun, a verb, a pause… an exclamation, an adverb, a folksy gesture and a blank stare.

Update: Slate bravely goes where most grammarians fear to tread, tackling the task of diagramming Sarah Palin’s sentences.