On The Posner Show, Sarah talks with Joanna about the LDS Church’s recent admission that Joseph Smith, Mormonism’s prophet and founder, practiced polygamy. Joanna explains the unusual way that the doctrine of polygamy continues to affect the lives of everyday Mormons, and how polygamy makes sense within Mormonism’s unique Christian theology. Joanna argues that the LDS Church leadership continues to view polygamy of an “eternal principle.” Plus: Seeing polygamists at the Costco.