I don't see any evidence of that. I think once someone has been bitten by the bug, and especially if they actually won a primary, they keep dreaming that lightning will strike again and they have a chance. All these guys have a vision that they could be president. And in the case of Huck and Santorum they had nothing better to do and nothing to lose.
+1
If they didn’t have such a well-documented history of doing exactly what I said, I might agree with you.
But they do have a history of being frauds and used as blockers for viable conservative candidates.