What, Cain and Bachmann are not passionate? Or maybe Santorum thinks they are not conservative. Or maybe he thinks they are really not running for president.
It's quotes like the one above that make Santorum sound a bit immature.
One thing I've noticed about him this time around is that he spends a lot of time talking about himself and not nearly enough time discussing solutions to the pressing problems of the day. Which is likewise not the mark of a mature politician.