According to Wikepedia, the Journal of John J. Roberts, March 2, 1902, said that in May of 1843, Joseph Smith, Jr. gave the White Horse Prophecy.

1902 is so many years past when this was supposedly said, that I think it was a fiction. Supposedly 2 guys had said that he said it in 1843, in 1853.

I have long believed Joseph Smith had said the Constitution will be hanging by a thread. I am very conservative and love the U.S. Constitution. It would be super cool of he’d said that. But now I see that it is very unlikely that it is so.

Here is a great article. Joseph Smith’s White Hose Prophecy, LatterDayConservative