Palin has the spirit and fire that we crave in a prospective nominee. She moves us from our seats, as does Gingrich with his ideas and Santorum at times with his convictions.
Romney of course has neither the spirit, nor the fire, nor the convictions nor the ideas. As a candidate he evokes the same feeling as a Gerald Ford.
A Palin speech causes the desire to march to the polling place this minute, torch and pitchfork in hand. That is very dangerous to a liberal democratic nominee.
You got it!