Since the “Tea Party” movement is totally grass roots, with some organizers, but no real organization, I’m not too sure who’s in a position to do endorsing on behalf of the movement. Somehow it doesn’t seem kosher. Seems each individual who considers himself/herself a Tea Partier is in a position to listen to various other individual endorsements and decide who s/he thinks is best suited for the job.
I never mentioned an endorsement, the only polling that separates out California tea partiers shows that Fiorina wins the largest number of those that identify with the tea party "A lot".