Television's Sister Wives To Challenge Utah's Polygamy Laws

In a political gift to anti-gay groups nationwide, the cast of the reality show Sister Wives plans to file a federal lawsuit challenging Utah's law against polygamy.

The polygamist family portrayed on the TLC reality show "Sister Wives" said all along its main goal in going on national television was to gain public acceptance of its lifestyle. Now family patriarch Kody Brown, his four wives and 16 children and stepchildren are moving from the court of public opinion to the court of law, arguing that criminalizing their lifestyle is unconstitutional. On Wednesday, the Browns are expected to file a federal lawsuit to challenge the polygamy law in their home state of Utah, where they came under investigation for violating the state law that prohibits polygamy. Brown and his four wives -- Meri, Janelle, Christine and Robyn -- moved their family to Las Vegas earlier this year, in part, they told ABC News, to escape the criminal investigation.