If you go here, you can watch his off-air, unscripted "debate" with a radio host who kept insisting that Romney should discuss his Mormon faith in great detail. Romney disagreed. And this time, he's right. Presidential campaigns aren't an occasion for the candidate to hold seminars on his religious faith. John F. Kennedy didn't make the 1960 race all about his Catholicism. Nor should he, given that he made it clear his church and his Pope, though important to him, would not dictate what he did. Romney has made it clear that it will be the same way with him and his church, should he become president. That falls well within the American tradition.
I don't blame Romney for not going back on that radio show.