Not really. While this is widely believed, it's apocryphal. [0] If we do believe the apocryphal account, there are still a couple of issues. First, it doesn't

Not really. While this is widely believed, it's apocryphal. [0] If we do believe the apocryphal account, there are still a couple of issues. First, it doesn't imbue a duty to vote for a Mormon guy. If the Constitution really were in maximum danger, it'd be dubious that voting in a normal election would be the mechanism used to save it. Second, it doesn't say that a Mormon will save the Constitution by becoming president or anything like that. It says the Elders of Israel (that is, the men of the Church) will save it. That means more than voting for one guy. It probably means something more like being instrumental in a major cultural adjustment that would cause the principles in the Constitution to be valued again. This is harder than voting, so people don't prefer this interpretation. It may not even be literal -- the Constitution could be suspended/ineffective in what we now know as the U.S., but "saved" by Mormon elders who set up a separate government that substantially respects its principles. Whether one accepts this apocryphal prophecy or not, it does not mean Mormon candidates should be favored, and IMO, it shouldn't be a significant factor for Mormon voters. [0] http://www.mormonnewsroom.org/blog/church-statement-on-white-horse-prophecy-and-political-neutrality http://www.mormonnewsroom.org/blog/church-statement-on-white...