In the Austin American Statesman, Rick Perry, governor of Texas, provides an interesting lesson in how to endorse two candidates who are fighting each other :
The issue becomes very, very clear to me from the standpoint of who I want to support. And it is Mike Huckabee. And then it goes to the next level, which is who do we have who is the most electable of our candidates, and I think without a doubt it’s Rudy Giuliani.
There was much covering of tracks by Perry and his staff after this statement. But he seems to be saying that he wants Huckabee to win, but thinks Rudy will win, so he is endorsing Rudy.