Just a hunch, but Sarah may be thinking of Perry for her VP. That is the only reason I can come up with for her complimenting him all the time. He might be a good VP pick, but I think if she could get him, Rubio would deliver the Hispanic vote, which is huge.
Now that is one tight theory. I like it.
It makes a lot more sense than Sarah promoting Perry for a presidential run. He may be mostly on the reservation now, but he's broken the deal with conservatives far too many times in the past, to seriously be considered for president.