My bet is that his speech will be a Neuhaus-ghost-written defense of religion's centrality to politics. I doubt a great deal that he will address all the conventional LDS-specific issues many evangelicals have. Romney clearly doesn't want to talk about that at all, and I don't blame him. But once you make your appeal on the grounds of faith to a religiously-based party, it's tough to keep to secular reticence and privacy on the subject. Check out this clip: he looks extremely defensive and awkward. If this is how he comes across Thursday he'll lose Mormon votes as well as evangelical ones.