One does not have to come out publically to support a particular candidate to be kingmaker. There are other ways. Bringing up the negatives of other candidates, for example, is an action of a kingmaker. Knocking down the opposition of your unannounced favored candidate is very effective.
Everybody has an opinion positive and negative about those up on the stage. Even Sarah Palin. They may not have told you which ones they like but that does not mean they do not have a favorite one.
So you’re saying she favors Cain? Hmmmmmmm