The Salon has done some good reporting on Mitt Romney.
What Have Church Leaders Said About The White Horse Prophecy?
In General Conference, October 1918, Joseph F. Smith made the following comments:
The ridiculous story about the red horse, and the black horse, and the white horse, and a lot of trash that has been circulated about and printed and sent around as a great revelation given by the Prophet Joseph Smith, is a matter that was gotten up, I understand, some ten years after the death of the Prophet Joseph Smith, by two of our brethren who put together some broken sentences from the Prophet that they may have heard from time to time, and formulated this so-called revelation out of it, and it was never spoken by the prophet in the manner in which they have put it forth. It is simply false; that is all there is to it.
Elder Bruce R McConkie also commented on the prophecy in his book Mormon Doctrine:
From time to time, accounts of various supposed visions, revelations, and prophecies are spread forth by and among the Latter-day Saints, who should know better than to believe or spread such false information. One of these false and deceptive documents that has cropped up again and again for over a century is the so-called White Horse Prophecy. This supposed prophecy purports to be a long and detailed account by the Prophet Joseph Smith concerning the wars, turmoils, and difficulties which should exist in the last days.
In 2010 the Church released a statement on the White Horse Prophecy and Political Neutrality:
The Church of Jesus Christ of Latter-day Saints is politically neutral and does not endorse or promote any candidate, party or platform. Accordingly, we hope that the campaign practices of political candidates would not suggest that their candidacy is supported by or connected to the church.
The so-called White Horse Prophecy is based on accounts that have not been substantiated by historical research and is not embraced as Church doctrine.”