It's one thing to point out Bammy's shortcomings...and there is abundant material for that...but, the tense voice and tight pronunciation does not sound presidential, to me.
It is a problem. A caller mentioned it to Rush yesterday and he spent a few minutes talking about how it isn't a good thing for Santorum and his image to the voters.
Perhaps Rick is used to campaigning in a blue collar state, where that "attitude" of "rage against the man" plays well. Santorum needs to recalibrate his tone.