Lawsuit against the State of Montana relating to the case above. The legal claim refers to the Obergefell decision a number of times.
In Obergefell v. Hodges, the United States Supreme Court further noted that when "new insight reveals discord between the Constitution's central protections and a received legal stricture, a claim to liberty must be addressed .... The limitation of marriage to opposite-sex couples may long have seemed natural and just, but its inconsistency with the central meaning of the fundamental right to marry is now manifest."
Obergefell essentially extended Lawrence's holding to state that the "State cannot demean their [Plaintiffs'] existence" by favoring monogamist couples over plural families by giving monogamists marriage licenses while forbidding plural families that same right.