But even if polygamy was legalized, the LDS church might not resume its practice due to political considerations. Yes they still have the 132nd Section of the D&C scripture book. But lately their prophet Gordon B. Hinckley has taken a very flexible approach on doctrine/truth. For example:
(1) Whether God was once a man and whether men can become Gods used to be a very solid teaching in the church. But now nobody really knows anything about it anymore. Its just more a couplet than anything.
(2) Valiant women are no longer required to covenant to obey the law of their husband. Now they just have to hearken to his counsel as he hearkens to the counsel of the Father.
(3) Joseph Smith and Brigham Young knew very profoundly with absolute certainty that the ancestors of the Indians were of Hebrew origin. Now with the Limited Geography Theory, this whole idea is pretty fuzzy.
(4) President Hinckley has said in the October 2001 General Conference that he doesn't know what the future holds. In the past, LDS prophets knew all sorts of things about the future. But now the prophets don't know much about the future.
(5) The church used to be very vocal about the evils of Monogamy and how the one-wife institution brought down the Roman civilization or any other civilization that practiced such an institution. However, lately, the church has not been critical of the institution of monogamy.
(6) God's law used to be DEATH ON THE SPOT for interracial marriage according to LDS prophet Brigham Young. In 1978, the LDS First Presidency announced that black men could be ordained to the Priesthood but the church leaders re-emphasized in a light manner their concerns about interracial marriage. Lately they don't talk about this much anymore.
They still believe that Brigham Young was a true prophet. Same goes for the other 13 men who are former church presidents. But they think that God has been changing his doctrines to adapt with the times through modern revelation. Just like D&C 101 was zapped in 1876 (i.e. the one that forbid polygamy) to make way for canonization of the present D&C 132, the LDS church president might get another revelation to abolish D&C 132.
I tend to think that they'll not resume practicing polygamy because overall it'll bring them more tithing and baptisms to not resume it's practice. As my sister, a returned LDS missionary, once told me, "who cares if they lie, what matters is that they save souls".
God is unchanging, now, before, forever. If he were anything else, he would cease to be a god. You would not find any of the 6 points supported in any LDS book or site... try www.lds.org for all of your facts on the Mormons... I think they know best.