The feds have been negotiating for a long time. Not too much background has been given except of course they had no where else to go.
Polygamy is illegal. A Mormon man is in jail for the same thing today. He had 14 wives and 32 children. This situation should be dealt with right away. They think that their lifestyle is acceptable.
They will deal with it themselves in short order. They are determined to become Americans, not to change America into something else.