To paraphrase Tina Turner, what's religion got to do with it? Wright was pastor of a "Black Liberation" church. In case you don't know, black liberation has very little to do with belief in God or Jesus Christ. Wright preached hatred for whites and America. It is as we now say in the Catholic Mass, right and just to go after that!
In case you didn't know, neither does mormonism.
Trust me, Romney doesn't want his religion looked into. Jermiah Wright's rantings has affected hundred, perhaps thousands, Joseph Smith's has affected millions.