There are numerous ways to frame these questions wrongly. Our responsibility as evangelical Christians is to think seriously and biblically about these issues. The first temptation is to reduce all of these issues to one question. We must address the question of Mormonism as a worldview and judge it by the Bible and historic Christian doctrine. But this does not automatically determine the second question — asking how Mormon identity should inform our political decisions. Nevertheless, for evangelical Christians, our concern must start with theology. Is Mormonism just a distinctive denomination of Christianity?
The answer to that question is definitive. Mormonism does not claim to be just another denomination of Christianity. To the contrary, the central claim of Mormonism is that Christianity was corrupt and incomplete until the restoration of the faith with the advent of the Latter-Day Saints and their scripture, The Book of Mormon. Thus, it is just a matter of intellectual honesty to take Joseph Smith, the founder of Mormonism, at his word when he claimed that true Christianity did not exist from the time of the Apostles until the reestablishment of the Aaronic and Melchizedek priesthoods on May 15, 1829.
From a Christian perspective, Mormonism is a new religion, complete with its own scripture, its own priesthood, its own rituals, and its own teachings. Most importantly, those teachings are a repudiation of historic Christian orthodoxy — and were claimed to be so from the moment of Mormonism’s founding forward. Mormonism rejects orthodox Christianity as the very argument for its own existence, and it clearly identifies historic Christianity as a false faith.
Link Mohler on the Mormonism-Evangelical Controversy – BCNN1 October 10, 2011 8:36 PM