For conservative Texans to prefer Ted Cruz and deplore the thought of establishment thinking Dewhurst as US senator, requires no one’s endorsement! It is what it is, in this case—a wash.
The risk may be diminishing, but in conservative states, Sarah’s endorsement isn’t necessary, but simply and probably appreciated, and in the liberal states, it may energize the Marxist base to some extent.
Still, a wash, but serves as a method to keep her name out there, for what it’s worth.
Palin’s endorsement may mean nothing to YOU, but to millions of conservative tea partiers she practically walks on water. And Cruz obviously liked the endorsement since he put it front and center on his facebook page.