If the Pubs on this site were representative (they aren't), Obama has this in the bag, because about half or close to it will vote for Obama over Santorum, and maybe a third will vote for Obama over Romney, or not vote, or vote third party. At least if you believe what folks post.
You're misinterpreting, I think. We're always thrashing Willard--he is such a very easy target, after all--but we'll vote for him in November.
Phil,
Santorum just alienated a whole bunch of people. Don't expect him to help his candidacy with this.