Eric, you wrote:

I can't help but wonder how Giuliani, McCain and Fred Thompson might have done if they'd actually participated.

That's a good question.  But ultimately, given the amount of money that it likely would have cost them to play, and given that not playing doesn't seem particularly damaging (unless any of them are neurotics and personally susceptible to Romney's schoolyard taunts that "they'd have played if they thought they could have won"-- a.k.a., "nah-nah-nah-nah-nah, I know you are but what am I"), I'm inclined to think they did well to sit this out.

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