Montana’s bigamy laws are being challenging. In the case, Collier v. Fox, plaintiffs Nathan, Vicki, and Christine Collier tried to legalize their plural marriage. In 2015, the Colliers were denied a marriage license by Yellowstone County. Nathan Collier, who is legally married to Vicki Collier, wanted to also marry Christine Collier. The result would be to legalize his domestic partnership with two wife's.

Judge Timothy J. Cavan found the Colliers could not challenge Montana’s criminal bigamy laws, because they didn't have standing. The Colliers failed to provide any evidence that Vicki Colliers is suffering a constitutionally-recognized injury to that relationship. The Court found Montana has not interfered in the Colliers’ way of life.

The court recognized United State Supreme Court upheld the constitutionality of anti-polygamy laws back in 1878.

Attorney General Tim Fox commented on the ruling. “Polygamous marriages are illegal across the country, and Montana is no exception. This ruling upholds the institution of marriage as a legal union between two people.”

Dominick

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