The Santorum die hards really do not like Mitt, that is why they are still supporting Santorum as an anti Mitt. I do not see those supporters flocking to Mitt if Santorum endorses Mitt.
So that endosrement, should it occur, will be of little benefit to Mitt.
They (supporters) may have their sails deflated though.
The same was said about Huntsman in New Hampshire... and look who he endorsed.
Santorum and Huckabee are very similar on their views and what they campaigned on in their respective elections... and Huckabee has already endorsed Romney.
And considering that their views are so similar, I’d hazard that Santorum will come to the same conclusion as Huckabee when the time comes. For it’s in his nature.
And the Santorum fans will again be disappointed.