For the record, polygamy is banned by the Utah Constitution, not by the Federal government. Way back in the day when people still understood what enumerated powers meant (when incidentally Federal prohibition laws didn't exist) it was acknowledged that the Federal government did not have the power to prohibit polygamy in a State. So, in order for Utah to become a State, they were required to enshrine polygamy bans in their Constitution, since the Federal territorial ban would be invalid upon Statehood.
For the record, polygamy is banned by the Utah Constitution.
Thanks, good to know. Then this issue could not come up in a dispute and is in keeping with my point of view, that the people themselves decide what laws they will live under, organizing restraints here and there as they see fit. Some power we give to the Federal Government, some to the states, and some we reserve to ourselves.
"whereby the Legislative Powers, incapable of Annihilation, have returned to the People at large for their exercise"
-Declaration of Independence