Santorum isn't exactly weak on the issue of immigration either.
But I think it is likely that Brewer will go for Mittens.
From a political standpoint yes - the mormons will reward her if she wants to run for a second term or for another office.
I doubt, however, that she relishes endorsing Romney because she is not really establishment. In fact, prior to leading the AZ GOP to massive political success in 2010 due to the immigration issue, the establishment really hated her. She is buddies with Sarah Palin and crew too...
