I find it curious strange that the Mormon Church is so eager to champion the joys of "one man, one woman", when it has been best known for its stand of "one man, as many women as we damn well please".
God is truly kind to the Mormons, though. When Mormon statehood was rejected by Congress over the issue of Mormon polygamy, the standing president of the LDS Church, who is also an elected prophet, declared that polygamy was out, monogamy was in, and *bing!* excess wives were ditched and Utah was admitted to the Union.
It would have been interesting had this issue been brought before the Supreme Court. Perhaps it was.
I don't see how a "strict constructionist" judge could find any way to ban Utah from statehood on the grounds that a lot of its people were polygamous. Any approval of monogamy or disapproval of polygamy that a Supreme might find would have to be found outside the Constitution, which makes no references to either.