7. Could it be they're still p.o.'d how Romney treated Perry?
Although Texans aren't crazy about Perry, he's still one of their own, and you don't mess with one of their own - especially as a Mormon and an outsider (anyone not a Texan).
The way Romney humiliated Perry is perhaps the reason why they won't prominently show yard signs in support, but I'm pretty sure they'll vote for him just out of fear of President Obama. Because that's what racism is ALL about: fear.