Wow - this is one of the most interesting video clips I've ever scene. It gets very heated. (HT: Dean Barnett).
Apparently this talk-show host taped Romney's radio interview without Romney's knowledge. Romney passionately explains his commitment to his LDS faith, his pro-life position, etc... a must watch.
Update: My spelling error of "scene" was unintentional - but it's also slightly clever, so I'll leave it. The interview was with Mickelson at Iowa station WHO.
Update 2: If you follow the url, you will note that this video was posted by the Romney campaign - they are embracing this video.