I wonder whether some of the reluctance to really hammer Paul comes from a desire not to be seen as the bad guy by Paul’s younger supporters. While some of Paul’s positions are appealing, he’s way more radical than the others. If those newsletters are anything to be believed, he has a real penchant for conspiracy theories too.
But a guy like Romney could benefit by positioning himself as the alternative to Paul. And it wouldn’t be too difficult to let Paul pick up a bit of a lead then blast him out of the water just before Super Tuesday. Let Paul be the not-Romney, then wait to ask Paul his feelings on Israel until it would hurt most.