David Bresnahan at American Chronicle has a good article on the Mormon church and Mitt Romney. He explains that the Mormon church is a Christian church, its members strive to live Christian principles, and Mitt Romney is a great candidate for U.S. President:
The next time a news reporter questions whether a Mormon can be elected president, take a look at it for what it is. A lazy reporter needed a story about Romney and could not come up with anything new other than to rehash the same tired story so many others have already done. The evangelical pastors that reporters quote in such stories are quick to exaggerate. In reality the typical evangelical Christian is not much different than a Mormon.
They both want the best for their families, and they both do their best to live according to the beliefs of their religion. Some of their doctrines are different, but their values are not. As more and more people focus on values instead of doctrines they will recognize that having a Mormon as president is just what this country needs.
Source: A Mormon President?