It's been seen so often it's become a cliche: The Republic of Deseret. A must-have in those various balkanised North America timelines and maps. A nation completely populated by Mormons, often based around the area of the state of Utah or Salt Lake City (in the US, just in case you don't know).
My question is this: How likely is it for a Mormon nation to be created, when will it most likely be formed, and what are the chances for its survival?