The Catholic, Jew, Orthodox, and Sikh I mentioned are all clergy of their faith. The Morman is a layman. Quite a difference. Just a friend of Romney’s. I stand by my statement.
No where in your original statement can be construed as limited to clergy, except for the rabbi. You may have written it differently from what you meant, as many people have when they try to write fast, but you should have simply owned it instead of trying to wiggle.
In any case, I fail to see why the person needs to be a clergy. Romney himself has (had?) a quite high position in Mormon Church (he is a Bishop or something). Obviously he wants the one representing his faith to be someone who is dear to him personally. From the article I linked to you, the Hutchkinson couple seems to be one.