Political paybacks. The same for Palin's endorsement of Perry.
Both Perry and Hutchison are huge RINOs and conservative Texans are going to be left with a choice between the lesser of the two RINOs next year.
FWIW, I think KBH is not only the bigger RINO, she has become a Washington elitist and doesn't know or care what's going on in Texas. Perry may be a big RINO as well, but Texas is the envy of the nation, these days, for having created more jobs and not running huge budget deficits. We can pick and choose things about Perry's performance as governor, but those are major attributes, IMO.
Check our true conservative Republican candidate for Texas governor Debra Medina at: http://www.medinafortexas.com/blog.php